+------------+----------------+-------------------+ | Rise. | Sine of Angle. | Angle in Degrees. | +------------+----------------+-------------------+ | 1 in 30, | ·0333 | 1·91 | | 1 „ 25, | ·04 | 2·29 | | 1 „ 20, | ·05 | 2·87 | | 1 „ 18, | ·0555 | 3·18 | | 1 „ 16, | ·0625 | 3·58 | | 1 „ 14, | ·0714 | 4·09 | | 1 „ 12, | ·0833 | 4·78 | | 1 „ 10, | ·1 | 5·73 | | 1 „ 9, | ·1111 | 6·38 | | 1 „ 8, | ·125 | 7·18 | | 1 „ 7, | ·143 | 8·22 | | 1 „ 6, | ·1667 | 9·6 | | 1 „ 5, | ·2 | 11·53 | | 1 „ 4, | ·25 | 14·48 | | 1 „ 3, | ·3333 | 19·45 | +------------+----------------+-------------------+ TABLE OF EQUIVALENT VELOCITIES. +-----------+-------------+-------------+-------------+-------------+ | | | | | | | Miles | Feet | Feet | Metres | Metres | | per Hour. | per Second. | per Minute. | per Minute. | per Second. | +-----------+-------------+-------------+-------------+-------------+ | | | | | | | 1, | 1·5 | 88 | 26·8 | ·447 | | 2, | 2·9 | 176 | 53·6 | ·894 | | 3, | 4·4 | 264 | 80·5 | 1·341 | | 4, | 5·9 | 352 | 107·3 | 1·788 | | 5, | 7·3 | 440 | 134·1 | 2·235 | | 6, | 8·8 | 528 | 160·9 | 2·682 | | 8, | 11·7 | 704 | 214·6 | 3·576 | | 10, | 14·7 | 880 | 268·2 | 4·470 | | 15, | 22 | 1,320 | 402·3 | 6·705 | | 20, | 29·4 | 1,760 | 536·4 | 8·940 | | 25, | 36·7 | 2,200 | 670·5 | 11·176 | | 30, | 44 | 2,640 | 804·6 | 13·411 | | 35, | 51·3 | 3,080 | 938·8 | 15·646 | | 40, | 58·7 | 3,520 | 1,072·9 | 17·881 | | 45, | 66 | 3,960 | 1,207 | 20·116 | | 50, | 73·4 | 4,400 | 1,341·1 | 22·352 | | 60, | 88 | 5,280 | 1,609·2 | 26·822 | | 70, | 102·7 | 6,160 | 1,877·5 | 31·292 | | 80, | 117·2 | 7,040 | 2,145·8 | 35·763 | | 90, | 132 | 7,920 | 2,414 | 40·233 |