Abstract
MR. WRIGHT has earned the warm thanks of all teachers and students who use the lantern for lecture or demonstration purposes by this excellent book. It contains about 400 pages. Of these, the first half is devoted to descriptions of the various parts of a lantern, and of apparatus accessory to its use. The principles of projection are clearly explained; then follows an account of the different forms of condensers and their relative advantages. Mr. Wright's criticisms of the various forms are clear and to the point. He recommends, as the one which is generally most useful, two planoconvex lenses with their plane surfaces turned outwards, the lens nearer the radiant being rather the smaller; A discussion of the various forms of objectives comes next, with practical hints for testing both them and the condensers. After this we have several chapters devoted to possible sources of light.
Optical Projection.
By Lewis Wright. (London: Longmans, Green, and Co., 1891.)
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Optical Projection. Nature 43, 555–556 (1891). https://doi.org/10.1038/043555a0
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DOI: https://doi.org/10.1038/043555a0
