While the arcs with plain carbons are bluish-white, those with carbons containing calcium fluoride have a notable golden glow. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
Metal tubes T T connected the conducting wires F F to the carbons. Edward W. Byrn.十九世纪发明进展.
With the best vacuum that he could then get by means of the ordinary air-pump, the carbons would last, at the most, only from ten to fifteen minutes in a state of incandescence. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
Four forms of arc light with special carbons. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
Edison was not satisfied with paper carbons. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
Clock mechanism for thus regulating the feed was first employed, which served to automatically keep the carbons a definite distance apart, this being a necessary condition of the arc. Edward W. Byrn.十九世纪发明进展.
Brush adopted a three-wire system; and both obtained a uniform consumption of the carbons. 威廉·亨利·杜利特.世纪发明.
The great necessity for more durable carbons became a desideratum so urgent that the tireless inventor decided to commission another explorer to search the tropical jungles of the Orient. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
Edison also tried hard carbon, wood carbons, and almost every conceivable variety of paper carbon in like manner. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.