Title :
Metallic tungsten and some of its applications
fDate :
6/1/1912 12:00:00 AM
Abstract :
Tungsten does not occur as such in nature; but in the form of compounds it is pretty well distributed. The most important ores are sheelite or calcium tungstate and wolframite or iron-manganese tungstate. The principal source of the ore at this time in this country is Boulder County, Colorado.
Keywords :
Carbon; Contacts; Heating; Platinum; Tungsten; Wires;
Journal_Title :
American Institute of Electrical Engineers, Proceedings of the
DOI :
10.1109/PAIEE.1912.6659826
