The microscope : its construction and management : including technique, photo-micrography, and the past and future of the microscope (1893)
Heurck, Henri van, 1838-1909 · London : C. Lockwood ; New York : D. Van Nostrand Co. · leaf 257
Fig. 164. 236 CARL ZEISS. fitted to the under surface by a bayonet point; the whole of this can beremoved when oblique light is required. The mirror, plane on one side and concave on the other, is fitted toa jointed bar giving oblique illumination in all positions. … Fig. 165.
Microscopy
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