Beck, Conrad, 1864- · London, R. & J. Beck, Ltd. · leaf 48
- powerdark-ground illu-mination, al-though this lampis not recom-mended for thelatter purpose. The ordinaryelectric incan-descent lamp pro-vided with afrosted or groundglass bulb is ahandy lamp forordinary observa-tion, but is notsufficiently bril-liant for many purposes. It is supplied on an… … Fig. 37.—No. 3336, Electric Lamp on Stand. 46 THE MICROSCOPE Electriclamp.
Microscopy
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
