Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 323
ce of light. In its stand-ard form this lamp consists of a long glass tube from which the airhas been carefully exhausted and which coaitains a small amountof metallic mercury. The mercury is held in a large bulb at oneend of the tube and forms the negative electrode in the direct-current lamp. The… … Fig. 18. Cooper-Hewitt Type H Mercury Vapor LampCourtesy of Cooper-Hewitt Electric Company gives the general appearance of a standard lamp having the fol-lowing specifications:
Electrical engineering
Internet Archive · Northeastern University Library · Public Domain Mark 1.0. Free to use for anything.
