Well's natural philosophy : for the use of schools, academies and privte students, introducing the latest results of scientific discovery and research ; arranged with special reference to the practical application of physical science to the arts and the experiences of everyday life ; with three hundred and seventy-five engravings (1873)
Wells, David A · New York : Ivison, Blakeman, Taylor and Co. · leaf 366
e microscope is generally a simple convex lens, in the locus of which the object to be examinedis placed. Little spheres of glass,formed by melting glass threadsin the flame of a candle, formvery powerful microscopes. Fig. 293 represents the mag-nifying principle of the micro-scope. An eye at E… … Fig. 294 represents the most im-proved form of mounting a simplemicroscope. A horizontal support,capable of being elevated or depressedby means of a screw and ratch-woik,D, sustains a double-convex lens, A.The object to be viewed is placedupon a piece of glass, C, upon a stand-ard, B, immediately…
Physics · Science · Technology
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