Beck, Conrad, 1864- · London, R. & J. Beck, Ltd. · leaf 49
bulb can be placed in the optic axis of the bulls-eye condenser (K). The arm (H) has at-tached to it a thin metal cylindrical tube with a circular aperture which forms a sMeld to cut off . stray light from the room, and when the electric bulb has been adjusted to the Fig.39.—^No.3332, Pointolite… … ILLUMINATING APPARATUS 47 for colour screens or ground glass. It is supported on a rod (L)wMch moves backwards and forwards parallel with the opticaxis for obtaining either parallel or convergent light, and can beclamped in any position. If the condenser is not required it can be swung to one…
Microscopy
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
