Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 212
Chimney and Shade of SwiftsMicroscope-Lanip. 132. Position of the Light—When the Microscope is usedby daylight, it will usually befound most convenient to placeit in such a manner that the Alight shall be at the left handof the observer. It is most im-^portant that no light shouldenter his eye,…
Microscopy · Biology
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