TABLE No. 2.
At the elevation of 3,500 feet, 1 Degrees equals about 520 feet, from which the following—
Degrees Feet. Degrees Feet Degrees Feet.
1'0 . . . 520 '7 . . . 364 '3 . . . 156
'9 . . . 468 '6 . . . 312 '25 . . . 130
'8 . . . 416 '5 . . . 260 '2 . . . 104
'75. . . 390 '4 . . . 208 '1 . . . 52