Elementary treatise on physics, experimental and applied : for the use of colleges and schools (1906)
Ganot, A. (Adolphe), 1804-1887, Atkinson, Edmund, 1831-1901, Reinold, A. W. (Arnold William), 1843-1921 · New York : Wood · leaf 632
ery nearly to coincide with (he focus of the eyepiece N ; hence it may be concluded that the magnifying power is 6i4 On Light [606- greater in proportion as the object-glass is less convex, and the eyepiecemore so. When the telescope is used to make an accurate observation of thestars—for example,… … Fig. 594 circular aperture in a small metal plate (fig. 595), their intersection being onthe axis, or line of collimation, of the telescope. The cross wires are focusedby moving the eyepiece with regard to them, and the distant object is thenfocused by moving the tube (by rack and pinion)…
Physics
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