Brewster, David, Sir, 1781-1868, Bache, A. D. (Alexander Dallas), 1806-1867 · Philadelphia : Lea and Blanchard · leaf 283
race the outline of the image upon thepaper, the image being seen with half of the pupil, and thepaper and pencil with the other half. Many persons have acquired the art of using this instru-ment with great facility, while others have entirely failed. Inexamining the causes of this failure,… … * An account of these various forms will be found in the EdinburghJournal of Science, No. V. p. 157. CHAP. XLI. ON SINGLE MICROSCOPES. 279 fig. 156., where ABCD is a piece of thick parallel glass,F G IfC a metallic mirror, whoso face, P G, is highly polish-ed, and inclined 4)° to B C. Rays from an…
Optics
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