The wonders of modern mechanism. A résumé of recent progress in mechanical, physical, and engineering science (1896)
Cochrane, Charles Henry, 1856- · Philadelphia J.B. Lippincott · leaf 399
engths of therespective rays. If a Rowland concave grating is used no observingtelescope is required, a real image being formed that maybe thrown on a screen or photographic plate. 390 WONDERS OF MODERN MECHANISM. In other instruments the telescope itself can be movedin the horizontal plane, and… … Principle of the Spectroscope.—a, prism; b, telescope through which the lightmay pass ; c, magnifying eye-piece; d, scale. from a suitable scale on the stand. For astronomical usethe spectroscope has a still different form, and is attachableto a telescope, through which the light of a star may…
Inventions · Mechanical engineering · Machinery
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