Machinery and processes of the industrial arts, and apparatus of the exact sciences (1869)
Barnard, Frederick A. P. (Frederick Augustus Porter), 1809-1889 · Washington, Govt. print. off. · leaf 600
be at the points B and D, thedistance of these points from each other would vary according to therequired law. The manner of adapting a contrivance of this description to a tele-scope, so as to make the instrument fulfill the prescribed condition, isshown in Fig. 124. Herewe have the triangleABD of… … Fig. 124. The tubeDE, which is pivoted at 0, has withinit two sliding tubes, one of which carries the object-glass, and the otherthe eye-glass. These sliding tubes are moved by the arms AD, BE, whichare connected with them at the points D and E, by pivots passingthrough slots in the outer tube. It…
Machinery · Scientific apparatus and instruments
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
