"Tungsten" Quotes from Famous Books
 ... other rare metals were the subject of casual trial. No real success was attained in that direction, and for many years the carbon-filament lamp reigned supreme. During the last four or five years lamps with filaments made from tantalum and tungsten have been produced and placed on the market with great success, and are now largely used. Their price is still very high, however, as compared with that of the carbon lamp, which has been vastly improved in methods of ...
— Edison, His Life and Inventions • Frank Lewis Dyer and Thomas Commerford Martin |
