Beale, Lionel S. (Lionel Smith), 1828-1906 · London, Harrison · leaf 54
a, 5, c (Fig. 26, Plate XI); a carries theeye-piece, is four and a-half inches long, and slides in h, which isof the same length, but only slides up to its centre in the outertube c. Tube h carries the object-glass. The tube c can be fixedby aid of a screw ring d, at any height, according to the… … [To face page 14. J PLATE X.
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