+----------+----------------------+----------------------+ | | 2 Pounds. | 3 Pounds. | | +-------+------+-------+-------+------+-------+ |Elevation.|Flight.|First |Extreme|Flight.|First |Extreme| | | |Graze.|Range. | |Graze.|Range. | +----------+-------+------+-------+-------+------+-------+ | Deg. | Sec. |Yards.|Yards. | Sec. |Yards.|Yards. | | | | | | | | | | 1 | 2 | 453 | | 3 | 479 | | | 2 | 4 | 595 | | 5 | 722 | | | 3 | 4 | 666 | | 5 | 921 | | | 4 | 5 | 847 | | 5 | 1000 | | | 5 | 5 | 957 | From | 7 | 1325 | From | | 6 | 7 | 1173 | 1400 | 8 | 1530 | 1400 | | 7 | 9 | 1449 | to | 9 | 1577 | to | | 8 | 8 | 1355 | 1900 | 9 | 1721 | 2000 | | 9 | 8 | 1585 | | 9 | 1801 | | | 10 | 10 | 1853 | | 9 | 1791 | | | 11 | 9 | 1793 | | 12 | 1013 | | | 12 | 10 | 1686 | | | | | +----------+-------+------+-------+-------+------+-------+ _LEVELLING.—Table shewing the Difference between the True and Apparent Level._ +---------+----------+---------+-----------+ |Distance.|Difference|Distance.| Difference| | | of level.| | of level.| +---------+----------+---------+-----------+ | Yds. | Inches. | Mls. | Ft. In. | | | | | | | 100 | 0.026 | ¼ | 0 0½ | | 200 | 0.103 | ½ | 0 2 | | 300 | 0.231 | ¾ | 0 4½ | | 400 | 0.411 | 1 | 0 8 | | 500 | 0.643 | 2 | 2 8 | | 600 | 0.925 | 3 | 6 0 | | 700 | 1.260 | 4 | 10 7 | | 800 | 1.645 | 5 | 16 7 | | 900 | 2.081 | 6 | 23 11 | | 1000 | 2.570 | 7 | 32 6 | | 1100 | 3.110 | 8 | 42 6 | | 1200 | 3.701 | 9 | 53 9 | | 1300 | 4.344 | 10 | 66 4 | | 1400 | 5.038 | 11 | 80 3 | | 1500 | 5.784 | 12 | 95 2 | | 1600 | 6.580 | 13 | 112 2 | | 1700 | 7.425 | 14 | 130 1 | | | | 15 | 150 | | | | 16 | 175 | +---------+----------+---------+-----------+ This table will answer several useful purposes.