Multiprotocol Router – Press RETURN to get started!

1979, Palo Alto, California: Xerox PARC (Palo Alto Research Center) gives some Altos workstations and Ethernet cards to Stanford University’s Medical Center. Among the many inventions PARC engineers created are laser printers, GUI (Graphical User Interface), Ethernet, personal workstations, and VLSI (Very Large Scale Integration [with CalTech]). PARC’s Altos gift enabled engineers and computer scientists at Stanford to create the multiprotocol router that the Internet runs on. At the time, routers were called gateways. The engineers used PARC’s PUP (PARC Universal Packet).

As Bill Yeager recalled for John Dix, the Medical Center needed to connect with the rest of the Stanford campus, specifically the Computer Science and Electrical Engineering departments. Stanford University used “mainframes…DEC10…PARC Lisp…DEC Vax…Texas Instruments Explorers and Symbolic systems.” The different systems needed to connect and talk to each other but they were dispersed across campus and “people were tired of carrying tapes around.”

Yeager determined that what they needed was an operating system that was common to all parts. The equipment Yeager was using had only 56KB of user memory and no disks. “The struggle was always how many input buffers you could have…if you ran out of memory you were dead in the water. I spent an entire summer making sure the NOS scheduling and packet-switching algorithms were optimal.”

 

Andy Bechtosheim

Meanwhile graduate student Andy Bechtolsheim was building a board based on the Motorola mc68000 processor. “We plugged that sucker into a multibus backplane, plugged in some 3Com Ethernet boards…then I sat down and did a full transition of the code…I worked very, very hard to get that right. The only limitation was the bus speed…256KB of RAM–that was huge at the time. To me it seemed like paradise.”

The Motorola CPU also allowed Yeager to use a newer version of C, cc68. He wrote in IEEE Internet Computing: This “permitted the inline assembly language statements necessary for performance enhancements in the I/0 drivers and scheduler. The extra memory it provided let me route four protocols and augment the router services.”

This became the “Blue Box,” and soon about twelve Blue Boxes were installed across the Stanford campus. The Stanford team was not working in a vacuum. They used code written by a team at MIT to connect Stanford to the Internet. The recipe for gateways or routers as they became known, was written in 1979 by Virginia (Ginny) Strasizar, an engineer for BBN, who released IEN #109 How to Build a Gateway. This explained how to set up routing from and to different networks. The paper documented routing using IEN #111 Internet Protocol or IP, which was written by a team at USC.

Virginia "Ginny" Strazisar, BBN software engineer. http://www.ithistory.org/honor_roll/fame-detail.php?recordID=928

Virginia “Ginny” Strazisar, BBN software engineer.
http://www.ithistory.org/honor_roll/fame-detail.php?recordID=928

Many of the Stanford personnel involved in the multi protocol router went on to found Sun Microsystems, Cisco Systems, and other influential technology companies. In addition to co-founding Sun, Andy Bechtolsheim was an initial investor in Google. Today, over two billion people are connected to the Internet and their access is achieved using routing technology based on that used by the “Blue Box.”

 

 

 

Juniper Networks MX2020 Universal Edge Router. Capacity 34 Tbps to 80 Tbps, Slots 2 Tbps

Juniper Networks MX2020 Universal Edge Router. Capacity 34 Tbps to 80 Tbps, Slots 2 Tbps

Sources:

Carey, Pete. “A Start-up’s True Tale: Often-told Story of Cisco’s launch Leaves Out the Drama, Intrigue.” San Jose Mercury News, Dec 1 2001. http://pdp10.nocrew.org/docs/cisco.html.

Cringley, Robert X. [nom de plume Mark Stephens]. “Valley of the Nerds: Who Really Invented the Multiprotocol Router, and Why Should We Care?” I, Cringley December 10, 1998. http://www.pbs.org/cringley/pulpit/1998/pulpit_19981210_000593.html.

Dix, John. “Router Man: The creator of the multiprotocol router reflects on the development of the device that fueled the growth of networking.” Network World March 27, 2006. www/networkworld.com/supp/2006/anniversary/032706-routerman.html.

Waters, John K. John Chambers and the Cisco Way: Navigating Through Volatility. New York: John Wiley & Sons, 2002. Google Books.

Yeager, Bill. “The Software that Launched Cisco Systems,” IEEE Internet Computing January-February 2005, 96, 94-95. pdf.

Cisco Routers & Switches, March 2013, CyFair College

Cisco Routers & Switches, March 2013, CyFair College

“Secret Communication System”- [ ] US Patent 2,292,387 (FHSS)

 

At a Hollywood dinner party in the summer of 1940, a movie star from Austria began conversing with her dinner partner, an avant-garde music composer. She was notorious for appearing as the first female frontal nude on film; he was the ‘bad boy’ of music, best known for his musical score in a Dadaist, post-Cubist art film. In her spare time, the bored actress tinkered with inventions such as soda pop in tablet form. In his spare time, the musician wrote an advice for the lovelorn column in Esquire magazine, driven by his interest in endocrinology. It was his interest in glands and her interest in improving her breast size and their mutual hatred of Nazis that led these two into an unlikely partnership.

Ekstase 1933.  Seventeen year-old Hedy Kiesler as Eva. http://retrografix.blogspot.com/2013/08/ekstase-1933.html

Ekstase 1933. Seventeen year-old Hedy Kiesler as Eva.
http://retrografix.blogspot.com/2013/08/ekstase-1933.html

Vienna, 1933, nineteen year-old Hedwig “Hedy” Kiesler, pampered daughter of an Austrian banker, the scandalous star of the Czech film Ekstase, married 33 year-old Friedrich “Fritz” Mandl, a munitions manufacturer who owned Hirtenberger Patronen-Fabrik. The marriage lasted four years. After a brief affair with Erich Maria Remarque, Hedy left Mandl for Hollywood. During the time she lived with Mandl, Hedy attended many gatherings where Mandl entertained fascist leaders in hopes of selling his wares. One visitor in particular, Hellmuth Walter, was a mechanical engineer who told Hedy about “his remote-controlled, wakeless torpedo.” Guided by wire and powered by hydrogen peroxide (which left no trace in seawater–thus wakeless), it utilized the standard German system used by planes “of 18 pre-launch selectable frequencies, spaced 100 KHz apart.” Allotting a single frequency to each bomber and his bomb prevented radio interference from other bombers. “Each bomber-missile pair” used one frequency. While an opponent might block the signal, it would take some time to determine which frequency was the right one. According to legend, this was one of many pieces of information Hedy filed in her brain.

George Antheil by Man Ray Music Division - Bok-Antheil Collection, Library of Congress, Miscellaneous Items in High Demand http://www.loc.gov/pictures/item/2005680961/

George Antheil by Man Ray
Music Division – Bok-Antheil Collection, Library of Congress, Miscellaneous Items in High Demand
http://www.loc.gov/pictures/item/2005680961/

George Antheil was an American-born composer who grew up in a bilingual German-English-speaking

George Antheil composing, 1940s Hollywood, http://otherminds.org/html/Antheilphotos.html

George Antheil composing, 1940s Hollywood, http://otherminds.org/html/Antheilphotos.html

family (although throughout his life, he would downplay the German and play up the bit of Polish in his family). In the face of parental opposition, he was determined to be a composer. George joined the U.S. Army Aviation Corps at age sixteen in 1918 to escape their disapproval. The army certified young George as an inspector of armory artillery ammunition but he did no flying. As he recovered from nasal surgery to improve his ability to withstand high altitudes, the war ended. The episode convinced his parents that Antheil was serious about music and from then on encouraged his career. After several years of study, he moved to Europe. He learned from Igor Stravinsky among others and began giving concerts where his modern style and content provoked or charmed audiences. Concert goers would riot, shout, and yell. Antheil met and eventually married Böski Markus and they lived in an apartment above the legendary bookstore “Shakespeare & Co” and became part of the elite artist circle that included James Joyce, Ernest Hemingway, Man Ray, Pablo Picasso, Ezra Pound, and T.S. Eliot. In 1924, he wrote Ballet mechanique, a piece for “two pianos, three xylophones, four bass drums, tam-tam, electric bells, three airplane propellors, and between four and sixteen synchronized player pianos.”

(for more on Ballet mechanique see: http://www.moma.org/collection/object.php?object_id=91484 )

Hedy’s hobby was inventing, she had already created a bouillon-like tablet that made soda from tap water (reportedly, with assistance from chemists employed by onetime beau, Howard Hughes). Antheil and Lamarr met several times in her Benedict Canyon home, discussing his theories on the pituitary system and increasing her breast size. They both spoke German and were excellent pianists. The two of them hated the Nazi regime. Hedy told George she thought the newly formed Commerce Department’ s National Inventors Council ought to debrief her on what she knew from Mandl’s parties. The NIC was created to speed the path of getting inventions Americans thought might be useful to the war effort to the correct federal entity. About four weeks into their friendship, an event happened that galvanized their activities.

Sinking of the SS City of Benares http://www.mikekemble.com/ww2/shipresearch.html

Sinking of the SS City of Benares
http://www.mikekemble.com/ww2/shipresearch.html

CORB, the Children’s Overseas Reception Board, was an arm of the British government charged with sending British children abroad to keep them safe during the Battle of Britain. Some 2,664 children were sent to the Dominions (Australia, Canada, South Africa, and New Zealand) ; the majority to Canada. On September 17, 1940, a U-boat  sunk the SS City of Benares, a liner carrying 90 children bound for Canada. The British government did not release the news until September 23rd and the outcry was so great the program was cancelled. Hedy was deeply distressed by the deaths of the children and determined to do all she could to stop the Nazis.

Philco "Mystery Control" a remote that used RF signals  received by the main radio console. Manufactured from 1939-1942. Retail price with radio was $162.50, approximately over $2600 today. http://philcorepairbench.com/mystery/history.htm

Philco “Mystery Control” a remote that used RF signals received by the main radio console. Manufactured from 1939-1942. Retail price with radio was $162.50, approximately over $2600 today. http://philcorepairbench.com/mystery/history.htm

Why did Hedy choose George Antheil? Hedy wanted to create a remote controlled torpedo. Biographer Richard Rhodes found a reference to the Philco 116RX radio in the notes she and Antheil used. The “Mystery Control,” radio station frequencies (up to eight station call signs) could be tuned by dialing them like a telephone. Supposedly, Hedy and George were trading licks back and forth on the piano, when Hedy wondered, what if a transmitter, on a plane or ship, was synchronized to a receiver, on a glide bomb, with both of them changing frequencies indiscriminately at the same time? A signal could pass through without being jammed. She called it “Frequenzsprungverfahren” – frequency hopping. Antheil, through his experience of writing Ballet mechanique, understood synchronization.  As a boys, he and his younger brother Henry would create and break codes as a hobby. Before Henry Antheil’s plane was shot down by the Soviets in June 1940, Henry, an attaché in the American embassy in Finland, would regularly pass coded information to George about the European war. George Antheil used that information to write the book The Shape of the War to Come. Since coming to Hollywood, George gained valuable experience with radio electronics and recording as he was writing music for films. That he also had experience in munitions made him the perfect collaborator.

Together, they worked for months on three inventions: a magnetic proximity shell, the radio-controlled torpedo, and the “secret communication system.” While there are official drawings for the patent application, as Richard Rhodes explains, the part of a patent that describes the practice of how the idea works is intentionally ambiguous—both to protect the design from competitors and to enable claims against any competing claims. They way Antheil and Lamarr illustrated their idea was to use the concept of the code-punched player-piano rolls whose perforations were “punched in identical patterns of random holes” (Butler 79). Both the ship’s transmitter and the torpedo also held “a motor and mechanical switches.” Upon launch, the motors would drive the ‘ribbons’ as Antheil and Lamarr called the rolls, “and the holes in the paper would change the frequency settings of both the transmitter and receiver,” allowing the signal between a ship and its torpedo to be very short and to “hop frequency to frequency” (Rhodes).  They used a series of condensers each of which would use “a different frequency on the carrier wave.” George chose to use eighty-eight hops—the number of keys on a piano (Rhodes .

Modern CD cover, George Livingston. http://www.guylivingston.com/content/discs.shtml

Modern CD cover, Guy Livingston. http://www.guylivingston.com/content/discs.shtml

For a while, the Navy investigated several of their inventions and certainly the Navy needed someone’s help when it came to torpedoes. After the First World War ended, very little money was being spent on research which was done on lighter, practice torpedoes that “ran too deep, missing their targets entirely.” When the Japanese attacked the Philippines following the attack on Pearl Harbor, live torpedoes missed targets, ran too deep, exploded too soon, did not explode at all, or failed to have enough power to sink the targets. The magnetic exploder proximity fuse could not find the enemy (Rhodes 184-186). Ultimately though, the Patent Office issued Lamarr and Antheil a patent for the Secret Communication System and the NIC leaked the story to the New York Times. The Navy did not use frequency hopping until the 1962 Bay of Pigs incident. George Antheil died in 1959.

Frequency hopping spread spectrum (FHSS) became the basis for IEEE standard 802.11 Wireless LAN MAC and PHY, and FHSS is the foundation for Bluetooth (IEEE 802.15.1) technology. Bluetooth was intend for portable devices and used daily by millions of people. Most manufacturers and carriers use DSSS (Direct-Sequence Spread Spectrum) which “creates a redundant bit pattern for each bit transmitted” making data recovery easier in the event of damage (Conlan 679).

When the FCC ruled that the unused frequencies on the ISM band should be released for unlicensed use in 1985, commercial research into wireless technology began in earnest. Pioneers in the field rediscovered Hedy and George’s invention. One of these engineers was Dave Hughes who wanted to beat “evil empire phone companies” by giving rural schools the same kind of Internet access a T1 line can provide. With a grant from the National Science Foundation, he began his research and when found out about Lamarr and Antheil he posted the information on Stewart Brand’s Well. Hughes was able to enlist members on the Well to ensure Hedy (who was 82 by then) received the Electronic Frontier Foundation’s Pioneer Award in 1997.

 

Sources:

Butler, Alun. “Brunette Sinks Battleship”. New Scientist 160: 2165/6/7, (Dec 1998 Jan 1999), 78-79. Print.

Conlan, Patrick J. Cisco Network Professional’s Advanced Internetworking guide (CCNP Series). Indianapolis: Wiley Publishing, 2009. Google books, accessed 30 April 2014.

Lehrman, Paul D. “The Revival of George Antheil’s 1924 <i>Ballet Mécanique</i>.” Master’s thesis, Lesley College, 2000. Accessed March 30, 2014. http://www.paul-lehrman.com.

Piccirillo, Richard. <i>The Origins of the Anti-ship Guided Missile</i>. Arlington: 1997. Quoted in Rhodes.

Rhodes, Richard. <i>Hedy’s Folly: The Life and Breakthrough Inventions of Hedy Lamarr, The Most Beautiful Woman in the World.</i> New York: Doubleday, 2011.

Wikipedia contributors, “Bluetooth,” Wikipedia, The Free Encyclopedia, http://en.wikipedia.org/w/index.php?title=Bluetooth&oldid=606541888 (accessed May 1, 2014).

Wikipedia contributors, “Children’s Overseas Reception Board,” Wikipedia, The Free Encyclopedia, http://en.wikipedia.org/w/index.php?title=Children%27s_Overseas_Reception_Board&oldid=604145554 (accessed April 17, 2014).

Wikipedia contributors, “IEEE 802.11,” Wikipedia, The Free Encyclopedia, http://en.wikipedia.org/w/index.php?title=IEEE_802.11&oldid=605590182(accessed May 1, 2014).

Wikipedia contributors, “National Inventors Council,” Wikipedia, The Free Encyclopedia, http://en.wikipedia.org/w/index.php?title=National_Inventors_Council&oldid=603355162 (accessed April 28, 2014).

Barbed Wire

Mural: The Homestead and Building of the Barbed Wire Fence, (1939) by John Steuart Curry at the Department of Interior, Washington, D.C. Photo by Carol M. Highsmith, 2009.

Mural: The Homestead and Building of the Barbed Wire Fence, (1939) by John Steuart Curry at the Department of Interior, Washington, D.C. Photo by Carol M. Highsmith, 2009.

http://www.loc.gov/pictures/item/2013634348/

They used to take the shortest cut
The cattle trails had made;
Get down the hill by the easy slope
To the water and the shade.
But it’s barbed wire fence, and section line,
And kill-horse-travel now;
Scoot you down the canyon bank,—
The old road’s under plough. ⌊1⌋

Rarely has an invention evolved from such a simple idea as—”enclose everything that ought to be enclosed”⌊2⌋ —to taming a continent, transforming war, a psychological disorder, the inspiration of countless poems, and a symbol of survival. Barbed wire fences have dehumanized and empowered people. The rights to barbed wire patents led to landmark decisions by the Supreme Court. The United States has no less than four museums dedicated to barbed wire, collectors buy and sell antique ‘devil’s rope’ on eBay. How did the straightforward, rough-and-ready application of wire with twisted bits of sharper wire attached, a product that does exactly what it is supposed to do: “define space and to establish territorial boundaries,” ⌊3⌋become representative of so many concepts?

France issued three of the earliest patents for barbed wire during Le Deuxième empire français (the Second Empire), a time of political instability and insecurity. The first two (Grassins-Baledans, [45827] 1860) and (Jannin, [67067] 1865) were meant to prevent trespassers or to protect property from thieves. These designs used wire affixed to the top of an existing fence.

Meanwhile in the United States, the first Homestead Act finally passed in 1862. Thousands of people headed west to claim their 160 acres. Competition for water or the best grazing land was fierce. Stock-rearing ranchers grazed their cattle freely on the ‘open range’ in a place without “any prominent features of topography,”⌊4⌋ ranchers and farmers in the Great Plains lacked local materials to make fences like timber or rocks as in New England.

English common law required cattle owners to “fence in” their animals or be held responsible for trespass. But in North America, this law was disaffirmed and courts and legislatures required that land owners “’fence out’ neighboring animals as a condition precedent to a damage claim for injury caused by a trespassing animal.”⌊5⌋ Nebraskan poet Edwin Ford Piper:

When longhorns overran the settler’s land
The herd law would not grant him damages
Unless his crop was fenced. Hail to barbed wire!⌊6⌋

Photographer Solomon Butcher, 1888. Broken Bow, Custer County, Nebraska. Nebraska State Historical Society.

Photographer Solomon Butcher, 1888. Broken Bow, Custer County, Nebraska. Nebraska State Historical Society.

http://memory.loc.gov/cgi-bin/query/h?ammem/psbib:@field(DOCID+@lit(p10755))

In 1867, Gilbert Gavillard [775702] patented “a fence composed of artificial thorns caught between three strands of intertwined wire.” ⌊7⌋At almost the same time, William Hunt in New York received a patent for a “barbed wire fence with spur-wheels.” ⌊8⌋Hunt’s patent is also the first use of the word barb in the description. Lucien Smith of Ohio received one for a “wire fence with interlocking hubs…especially adapted to use in the prairies of the western states where timber is scarce and fires…destroy everything that is combustible.” ⌊9⌋This is the first designation that barbed wire was a solution to a western problem. So there were three inventors, working on the same concept in different places at the same time.

Then in 1868, Michael Kelly of New York received a patent for a “wire fence…with wires impart[ed] with the character of a thorn.” Kelly followed up with an additional design, a “fence…with thorns…thrust through the wires.” Kelly sold his rights of manufacture to the Thorn Wire Hedge Company who sold some of their rights to the Washburn & Moen Manufacturing Company, a maker of piano and telegraph wire.

DeKalb, Illinois County Fair 1873: A farmer, a hardware dealer, and a lumber merchant saw an exhibit of “a strip of wood about sixteen feet long and one inch square studded with short metal points.” Patented by Henry Rose of Waterman Station, Illinois a few months earlier, the three locals, Joseph Glidden, Isaac Ellwood, and Jacob Haish, realized that the studs could be applied to the wire itself far more effectively. Haish filed for three barbed wire patents between December 1873 and June 1874. Ellwood filed his patent in January 1874, and Glidden filed his in October 1873.⌊10⌋ In all, seven patents were filed within a few months of the fair with most of the applicants from Illinois or nearby Iowa. Inventors continued to submit and receive patents through 1996—nearly 600 in the U.S. alone; the greatest number of patents filed in a single year was 49 in 1882. Litigation began almost as soon as Glidden received his patent and lasted until the U.S. Supreme Court ruled in his favor in 1892. Because Glidden had manufactured 173,000 tons as opposed to Washburn/Kelly’s 3,000 tons in 1887, the Supreme Court ruled that Glidden deserved the patent as his had achieved the greatest “commercial success,”⌊11⌋ a new legal standard. In 1891, Congress passed the Everts Act, creating the federal appeals courts in an attempt to keep patent cases out of the Supreme Court.⌊12⌋

The use of barbed wire alienated Native Americans from each other, split families up, denied access to traditional nomadic routes and hunting grounds. Barbed wire surrounded the reservations that the federal government moved the Indians to. It held them in and out.

The battles for resources like water and grazing land led to numerous range wars where ranchers would send out wire cutting parties so their cattle could roam free. Piper’s narrator decides to leave the Platte, telling his horse: We’ll make our home in the sagebrush hills Till the devil puts a fence on that.⌊13⌋

Barbed wire is a “technology” “of violence” that “protect[s] the space [it] enclose[s]” and “protect[s] itself as well.”⌊14⌋ As it is made from iron, barbed wire is “more resistant to natural forces.” While it was created to prevent the movement of animals, it did not take long before barbed wire was applied to inhibit the movement of people beyond the open range. While there was some use of barbed wire as an entanglement during the Spanish-American War (1898), it was the British during the Second Boer War (1899-1902) who first used barbed wire to corral human beings. General (later Lord) Kitchener coined the term concentration camp when he devised his scheme of separating Boer guerrillas from their home bases. The British were fighting for diamonds, which were in Boer-held South Africa, while the Boers were fighting to hold onto their farms. Kitchener’s forces built a grid system of barbed wire enclosed camps along the railroads and forced Boer women and children to live within them. Over 100,000 Boer women, children and elderly men were held in the camps, some 30,000 died from diseases in the close quarters.⌊15⌋ Survivors probably would not have disagreed with Piper:

“They say that heaven is a free range land,—
Good-bye. Good-bye, O fare you well,—
But it’s barbed wire for the devil’s hat band,
And barbed wire blankets down in hell.”⌊16⌋

Notes

1  Edwin Ford Piper, “Have You An Eye,” in Barbed Wire, and Other Poems (Chicago: The Midland Press, 1917), 55-56.

2  Léonce Eugène Grassin-Baledans, French patent Nº45827 inAlan Krell, The Devil’s Rope: A Cultural History of Barbed Wire (London: Reaktion Books, 2002), 15.

3  Olivier Razac, Barbed Wire: A Political History, trans. Jonathan Kneight (New York: The New Press, 2002), x.

4  Reviel Netz, Barbed Wire: An Ecology of Modernity (Middleton, CT: Wesleyan University Press, 2004), 2.

5  Kevin R. Casey, “The Barbed Wire Invention: An External Factor Affecting American Legal Development”, in “The Bicentennial Issue,”  Journal of the Patent and Trademark Office Society 72:5 (May 1990): 433 www.stradley.com/articles.php?action=view&id=42.

6  Edwin Ford Piper, “Barbed Wire,” in Barbed Wire, and Other Poems Chicago: The Midland Press, 1917), 13-14.

7  Alan Krell, The Devil’s Rope: A Cultural History of Barbed Wire (London: Reaktion Books, 2002), 13.

8  Krell, 21.

9  Krell, 22.

10 Krell, 24.

11 Casey, 423 .

12 Casey, 439.

13 Piper, “Barbed Wire.”

14 Netz, 28.

15 Netz, 137-139.

16 Piper, “Barbed Wire”.

 

Sources

Casey, Kevin R. “The Barbed Wire Invention: An External Factor Affecting American Legal Development.” In “The Bicentennial Issue.” Special issue, Journal of the Patent and Trademark Office Society 72:5 (May 1990): 412-31. www.stradley.com/articles.php?action=view&id=42.

Google Patents.

Krell, Alan. The Devil’s Rope: A Cultural History of Barbed Wire. London: Reaktion Books, 2002.

Netz, Reviel. Barbed Wire: An Ecology of Modernity. Middleton, CT: Wesleyan University Press, 2004.

Piper, Edwin Ford. “Barbed Wire” and “Have You An Eye.” In Barbed Wire, and Other Poems, 13-14, 55-56. Chicago: The Midland Press, 1917. Courtesy of Bailey Library, Denver Museum of Nature and Science.

Razac, Olivier. Barbed Wire: A Political History. Trans. Jonathan Kneight. New York: The New Press, 2002.

Wikipedia contributors, “Barbed wire,” Wikipedia, The Free Encyclopedia, http://en.wikipedia.org/w/index.php?title=Barbed_wire&oldid=598468676 (accessed March 9, 2014).

Wikipedia contributors, “Second French Empire,” Wikipedia, The Free Encyclopedia, http://en.wikipedia.org/w/index.php?title=Second_French_Empire&oldid=593116588 (accessed March 16, 2014).

“Modern” Cement

Concrete Roman sewer (cloaca del foro)

Concrete Roman sewer (cloaca del foro) Image source: https://tinyurl.com/myson37

For centuries, human beings have blended water, ash, and silicates to produce mortars to bind building materials together or to form concrete masses for structures. Mortars were formulated with low-magnesial lime to join pipes supplying water across Asia Minor and Cyprus; in Ionia, the construction was so impermeable that pipes carried drinking water through canals. Techniques such as adding aggregates like crushed rock or sand to increase stability were used by the Romans to build aqueducts and other works;  this knowledge was lost with the end of the Empire. Egyptians, Persians, Indians, and Native Americans added gypsum (which inhibits flash setting, a condition where the concrete because too rigid too fast and produces a great amount of heat) to their mortars, however the Greeks and Romans did not and its use did not come to Europe until the seventh or eighth centuries. By the Middle Ages, improvements in water resistance came when builders in central Asia added sour camel’s milk to their mortars and in England where builders used Cheshire cheese.  Egg white was used for the same reason during the building of the Charles Bridge in Prague (1357-1402).

Smeaton's Lighthouse, also known as the third Eddystone Lighthouse in situ

Smeaton’s Lighthouse, also known as the third Eddystone Lighthouse. Image source:  https://tinyurl.com/nsxy987

By the time the Industrial Revolution arose, there was a huge need to build large industrial buildings, as quickly and cheaply and durably as possible as well as move water and other fluids in large quantities. The answer was a new kind of cement. British civil engineer John Smeaton was commissioned to build a new lighthouse on a reef along a strategic shipping channel in southwest Britain. Smeaton used “hydraulic lime” which sets under water. The lighthouse was under construction from 1756 to 1759 and remained in operation until 1877 when the rocks beneath it became unstable.

One interesting aspect of cement is that while people knew how to make and use it, they did not understand why it worked or which chemical reactions caused the properties that achieved the desired results. Smeaton’s experiments led to the discovery of how much clay the various components contained was the only factor in making them hydraulic.

Several men patented or marketed products called “British cement” or “Roman cement,” but it was an English stonemason, Joseph Aspdin, who first employed the term “Portland cement” perhaps to evoke the cachet of stone on the Isle of Portland. Aspdin first marketed Portland cement in 1824, and by 1843, his son William used the name “Patent Portland cement,” in spite of the fact that he did not have a patent. By 1853, William Aspdin moved his operations to Germany where the cement was fired in an endless kiln. The German standards organization eventually made this recipe the standard Portland cement, known the world over as ‘OPC’, Ordinary Portland Cement.

London Metropolitan Sewer at Rosebery Avenue. Image source: https://tinyurl.com/Subterranea-Britannica

London Metropolitan Sewer at Rosebery Avenue.
Image source: https://tinyurl.com/Subterranea-Britannic

Even Thomas Edison tinkered with Portland cement. Using his process, he claimed, contractors could pour an entire house using only a few men and a cement mixer, virtually eliminating the need for carpenters.

Modern cement was crucial to urbanization and industrialization. Transportation improvements such as canals, railroad foundations, and city streets flourished because of modern cement.

Gatun Lock - End of  the Day [1912] Joseph Pennell, (1857-1926). Image source: http://www.loc.gov/pictures/item/00649767/.

Gatun Lock – End of the Day [1912] Joseph Pennell, (1857-1926). Image source: http://www.loc.gov/pictures/item/00649767/.

Bibliography

“Houses of Cement,” Los Angeles Times, June 30, 1901. Accessed 31.01.2014

Mabry, James C. “The United States Portland Cement Industry from Domestic Supremacy to Foreign Domination.” PhD diss., Columbia University, 1998.

Nasvik, Joe. “Flash Set and False Set.” Concrete Construction (blog), September 1, 2000. Accessed 2.2.2014. http://www.concreteconstruction.net/concrete-setting/flash-set-and-false-set.aspx.

Sutherland, R. J. M., Dawn Humm, and Mike Chimes. Historic Concrete: Background to Appraisal. London: Thomas Telford, 2001. Google Books, http://books.google.com/books?id=GTjW1lZeYwgC&dq=John+Grant+of+the+Metropolitan+Board+of+Works&source=gbs_navlinks_s. Accessed 12.02.2014

Wikipedia contributors, “Concrete,” Wikipedia, The Free Encyclopedia, http://en.wikipedia.org/wiki/Concrete. Accessed 12.02.2014

———, “Eddystone Lighthouse,” Wikipedia, The Free Encyclopedia, http://en.wikipedia.org/wiki/Eddystone_Lighthouse. Accessed 12.02.2014.

———, “Portland Cement,” Wikipedia, The Free Encyclopedia, http://en.wikipedia.org/wiki/Portland_cement. Accessed 31.01.2014

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