Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 391
to be rackedup slightly to obtain the greatest intensity of light. In fig. 316 the expanded edge of the flamecovers the triceratium. When the whole apertureof the condenser is opened the size of that disc ivillnot be altered, its intensity only will be increased.When the stop is placed at the back… … EXAMINING THE KNOWN \NI> THE UNKNOWN 359 bring the lamp Dearer the mirror* The size of the disc of Light depends on three things : — a. The diameter of tlie bulls-eye. /?. The length of the path of the rays from the bulls-eye to the sub-stage oondenser. y. The magnifying power of the condenser.…
Microscopy
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