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Fwd: [ancient_waterways_society] Heat problem of smelting copper

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  • Ted Sojka
    In colonial times one of the tax stamp items was pottery, and it had top be made in England. The coastal regions are full of clay banks and wood fired kilns
    Message 1 of 1 , Mar 3, 2010
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      In colonial times one of the tax stamp items was pottery, and it had top be made in England.  The coastal regions are full of clay banks and wood fired kilns set up like chimneys in hillsides enabled them to reach temperatures of stoneware for jugs, dishes, and such.   It is the flow of air over your fire that raises the temperature.  

      The site I sent out earlier this evening showed amazement by those responding to the blog below the article about the civilization they knew little about.  Some of the new dates for the habitation sites in the Amazon are around 10000 before present and that challenges a lot of theories that have been accepted fact for a few decades.   

      A hide bag allowed bronze age smelters create primitive bellows for their metal making around the Mediterranean.  I think the native americans could also have developed a similar technology.
      ted
      PS
      There is a group in Minneapolis that is experimenting with primitive charcoal methods of working with copper.  Let me know if you want to get information on that group.


      Begin forwarded message:

      From: "Vince" <v_barrows@...>
      Date: March 3, 2010 7:59:21 PM CST
      Subject: [ancient_waterways_society] Heat problem of smelting copper

      When looking at the evidence of copper working in America, one is struck with the possibility that smelting and annealing were required to create copper celts, spears, figurines, and hooks. Considering the heat requirements for smelting copper (~1000 degree C), the obvious question is how to attain these temperature levels. Wood fires (~200 Deg C) probably did not provide enough heat alone. 

      An unexplored scenario is that natives used Oil as a source of fuel in their fires to manufacture these copper artifacts. There is evidence during prehistoric times at the Drake Well Museum grounds near Oil Creek State Park in Pennsylvania that the natives were pits for the purpose of collecting oil. 

      See the following link for more information on these Native American Oil pits
      http://s243. photobucket. com/albums/ ff280/Marburg72/ Pennsylvania/ ?action=view& current=IMG_ 0237.jpg

      Also, it is known that natural gas and methane gas bubbles up in the shallow bays and harbors. These gasses could have been collected in hide bags and used to provide heat in their fires. Local Louisiana lore is that these natural gasses were set on fire by the "settlers" around the 1800's because the gas bubbles would capsize boats. These fires could be seen for miles in the swamps and burned large quantities of natural gas until the 1950.

      Fires could have also been fueled with "Buffalo Chips". These compact fuel sources are renewable resources and but i am not certain about the temperatures that could be achieved. Maria Martinez used Cow chips in her pottery manufacturing process.

      Any comments are welcome;
      Vince


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