Hind, H. Lloyd (Herbert Lloyd), Randles, W. Brough (William Brough) · London : G. Routledge & sons, ltd · leaf 324
196 PHOTOMICROGRAPHY made by Zeiss at Fig. 63. A beam of light is projected through the opening p, and reflected by the prism through half of the objective, while the image-forming rays pass up through the other half. It will be noticed that the ob- jective mount in the figure is very short,… … Fig* 63 PRISM VERTICAL ILLUMINATOR purpose. The prism gives a more briUiant illumination than the cover-glass reflector, and can consequently be used with a less intense illuminant or a higher power objective. There is also less haze over the image of a highly polished metal surface, but the…
Color photography · Photomicrography
Internet Archive · Wellcome Library · Public domain (published before 1931). Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten20unit-933-418.webp)
![An illustration from Wedding's Basic Bessemer Process. Translated [from the supplement to the author's Darstellung des schmiedbaren Eisens” entitled, “Basische Bessemer oder Thomas Process”] ... by W. B. Phillips ... and E. Prochaska ... With a supplementary chapter on dephosphorization in the basic open-hearth furnace, by E. Prochaska (1891)](https://img.insideoutlibrary.com/img/200/bl-bl_003874923_0-106-1.webp)
