Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 312
Fig. 237. its light from a mirror beneath (fig. 237, A), the object must be somounted as only to stop out the central port ion of the rays that arereflected upwards. The curvature of the speculum is so adapted tothe focus of the objective that, when the latter is duly adjusted, therays reflected up… … UEBERKUHN—HOAV TO MOUNT OIUKOTS I-OK IT It has two manifest drawbacks : the first one, that of requiring nseparate Lieberkiihn for each object ice, is a difficulty which in thenature of things cannot be overcome. The radius of the Lieberkiihnmust alter with the focus of the objective employed, and…
Microscopy
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