Smith, Hamilton Lanphere, 1819-1903. [from old catalog] · Cleveland, M. C. Younglove and company · leaf 87
would appear in the quadrant, as in the figure preceding,broughtto the line of the horizon. Now just before noon, on ship-board,the sailor sets the index of his quadrant to about the altitude ofthe sun, and defending the eye by a set of dark glasses, shown atG, page 82 he looks through the eye-hole… … It is true, he cannot see the horizon in the silvered portion of thehorizon glass, but he can bring the image close to the line where thesilvering is removed from the glass* and then by inclining his qua-drant a little, as in figure 2, page 83, he can make the sun, appa-rently, describe the dotted…
Astronomy · Meteorology · Geology · Paleontology
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
