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The term wigwam has remained in common English usage as a synonym for any "Indian house"; however, this usage is dispreferred, as there are important differences between the wigwam and other shelters. During the American revolution the term wigwam was used by British soldiers to describe a wide variety of makeshift structures. [2]
The wigwam was made by Native Americans and covered with hides or bark. [5] A kind of corbelled dome using lengths of wood was used by the Anasazi to cover some kivas between 900 and 1250. A similar technique is used in Afghanistan. [6]
Parkesine, the first member of the Celluloid class of compounds and considered the first man-made plastic, is patented by Alexander Parkes. [4] 1869: John Wesley Hyatt discovers a method to simplify the production of celluloid, making industrial production possible. 1872: PVC is accidentally synthesized in 1872 by German chemist Eugen Baumann ...
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While no specification is made as to whether this is meant to be American football or soccer. Soccer is said to have been invented in Asia. [4] Anesthetics – Indigenous peoples used coca, peyote, datura and other plants for partial or total loss of sensation or consciousness during surgery. Western doctors had effective anesthetics only after ...
After experimenting with a plastic detergent bottle that proved incapable of withstanding the forces of pressurized liquids, he realized that a much stronger material would be required. He initially experimented with polypropylene , but ultimately settled on polyethylene terephthalate as the material and received the patent in 1973.
Wetu recreation at Fruitlands Museum. A wetu is a domed hut, used by some north-eastern Native American tribes such as the Wampanoag. [1] They provided shelter, sometimes seasonal or temporary, for families near the wooded coast for hunting and fishing.
In fact for every 10% of cullet added to the production of a new bottle, energy usage goes down by 3-4%. [2] Recycling one ton of glass can save approximately 42 kWh of energy which translates to 7.5 pounds of air pollutants not being released into the atmosphere. [6] An example of a "Bale" of plastic bottles at a recycling center.