341
OF ENGINEERING FORMULÆ.
Electrical Formula, by Paget Higgs, LL.D,, C.E.,
and R. S. Brough—continued
32. 1 grain = 0'064799 gramme,
log. 0'064799 = 2-8115683.
1 gramme = 15’43235 grains,
log. 15-43235 = 1-1884320.
grms. per yard x
„ „ foot X
grains per foot X
ozs. (av.) X
grms. per metre X
„ „ yard X
„ „ metre x
„ „ metre x
4’47317 — lbs. per knot.
13'41951 = „ „
0-8696 = „ „
380 = „ „
4'089 = „ „
5-146 = grains per foot.
4-7038 = „ „
14-115 — „ per yard.
kiloms. X 0-6213824 = miles (log. 1-7933573).
miles X 1'609314 = kiloms. (log. 0’2066370).
knots X 1'85528 = „ (log. 0'2684141).
kiloms. X 0’539001 = knots (log. !• 7315888).
knots X 1 • 15284 = miles (log. 0'0617540).
miles X 0 • 86742237 = knots (log. 1 • 9382344).
knots X 2029 = yards (log. 3-3072820).
yards X 0-0004929 = knots (log. 4-6927588).
kiloms. X 1093-633 = yards (log. J ■ 0383585),
yards X ’0009144 = kiloms. (log. 4-9611362).
Copper resistance per knot at75°F. x '5214 =
resist, per kilom. at 15° C.
O. R. at 15° C. per kilom. x 1*9176 = C. R. at
75° F. per knot.