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 134
tas seen in the plate. With regard to the rheostatitself, it is composed of a brasscylinder insulated at its footby a foundation of eboniteor serpentine. This cylindercontains a pile of thin discsformed of a mixture of graphiteand gelatine. The resistanceof these plates depend uponthe relative… … of the ance plates, the intensitymathematical precision. This apparatus being rather feeble for many kinds of research,M. Kagenaar, engineer of the University of Utrecht, has made a moreperfect one in accordance with our instructions, the construction ofwhich Professor Engelmann has kindly…
Microscopy
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