Page:Incandescent electric lighting- A practical description of the Edison system.djvu/25

This page has been validated.

Fig. 5.

(To face page 19.)

Retrieved from "https://en.wikisource.org/w/index.php?title=Page:Incandescent_electric_lighting-_A_practical_description_of_the_Edison_system.djvu/25&oldid=12259302"