Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, P. Blackiston's Sons and Co. · leaf 240
heir besl .-land (tig. 1,>.I). The sub-stage is compo.-ed oft hive parts, ai-ranged one above theother. This sub-stage, with the part.- separated to show theirconstruction, is presented in fig. 171. The upper part is a ringcarrying a removable iris diaphragm, so arranged as to comedirectly into… … 214 TIIK AXD DEVELOPMENT OF THE MICROSCOPE We note one admirable feature of the mechanical finish of themi(Toscope> of this lirin. which is. that they avoid sharp angles andknifelike edges to all their instruments. This looks a trifle, but theii-e of t he microscope with saprophytic, pathogenic, or…
Microscopy · Natural history
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