Recreations in astronomy : with directions for practical experiments and telescopic work (1879)
Warren, Henry White, 1831-1912 · New York : Harper & Brothers · leaf 86
he other end, and, looking toward the tree, you find the line of sight to the tree falls an inch from the end of the table on the farther side. The lines, therefore, approach each other one inch in every four feet, and will come together at a tree three hundred and eighty-four feet away. The next… … Fig. 26.—Measuring Elevations. and let the upper pin fall in line with your eve and thetop of a distant church steeple, and the lower pin inline with the bottom of the church and your eye. Ifthe church is three-fourths of a mile away, it must betwo feet high; if a mile away.it must be onehundred…
Astronomy
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