| http://www.w3.org/ns/prov#value | - Also, many natural fibers such as wool and cotton used in the late 19th and early 20th centuries have been replaced by synthetic fibers such as nylon.TentsWhen the Duke of Abruzzi climbed Mount Saint Elias in 1897, his party made use of two types of tents, each constructed from a waterproof canvas and considered to be light-weight for its time: the Whymper model (15 kg) and the Mummy model (6.4 kg
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