Nothing short of a knowledge of the underlying nature of phenomena can give science advantage over chan ce in hitting upon useful discoveries and inventions. 李贝.西洋科学史.
In 1852 Channing and Farmer, of Boston, Mass. Edward W. Byrn.十九世纪发明进展.
Channing in 1877, and it is the familiar form to-day, whose internal construction is shown in Fig. 58. Edward W. Byrn.十九世纪发明进展.