Submarine Appliances And Their Uses
Deep Sea Diving, &c., &c.

Displacement^ An ordinary-sized man (naked') displaces about .075 ton of sea water ; a fully and without equipped diver, with dress deflated, about 0.15 ton, and with dress fully inflated, about .31 ton. But if fully inflated he would float, and in so doing would displace exactly the weight of himself and dress, or 343 lbs = .153 ton, as his displacement would be greater than the equivalent weight of water if entirely submerged. BUOYANCY OF SUBMERGED OBJECTS. A submerged body displaces in the sea a weight of water equal to the cubic capacity of the body x Ö41bs. (the weight of a cubic foot of sea water). Thus a pontoon or camel, measuring- 15 feet long by 4 feet diameter, = 188.5 cubic feet, would displace nearly 5.4 tons of sea water if entirely submerged, and its buoyancy would be represented by this figure, minus the weight of the pontoon itself. METRIC WEIGHTS AND MEASUREMENTS WITH ENGLISH EQUIVALENTS. 1 Metre .915 ,, .3048 metre 1 millimetre 1 centimetre 2.54 centimetres 25.4 millimetres 1 kilometre 1.609 kilometre 2 imperial gallon 3 cubic inch of water > 9 9 9 9/ 99 99 99 4 cubic foot of water > > >> >> > > 99 99 2 pound of water >> >> 1 cwt. of water > ) 99 2 ton of water 39.3 7 inches = 3.281 feet 2 yard 3 foot inch = .03957 inch .3937 inch 4 inch 5 inch 1093 .61 yards = 3280.9 feet 2 mile 277.2 74 cubic inches .16 cubic foot 10.00 lbs. 4.543 litres 252.6 grains .03612 lb. .003607 imperial gallon 6.235 imperial gallons 28.315 litres ,0283 cubic metre 62.355 lbs. 27.632 cubic inches .10 imperial gallon 11.2 imperial gallons 1.795 cubic feet 224 imperial gallons 1017 litres (approx.) 1 cubic metre (approx.) 1 litre of water 1 cubic metre of water 1 kilo. 1 atmosphere 1 gramme 1 kilogram 1 millier (metric ton) 1 ounce (avoirdupois) 1 pound 1 cwt. 1 ton of 2240 lbs. 9 9 9 9 1 square inch 2 ,, foot 3 cubic inch 4 ,, foot 5 lb. per square inch ,, ,, >, foot 022 imperial gallon = pints 61 cubic inches .0353 cubic foot 220.1 imperial gallons 1.308 cubic yards 61025 cubic inches 35.3156 cubic feet 1000 kilos about 1 ton 1000 litres 2.2046 lbs. 1.0335 kilos, per sq. cm. = 14.7 lbs. persq. in. 15.432 grains (Troy) 2.2046 pounds or2| lbs. 2204.62 pounds or 0.9842 ton 28.35 grammes .4536 kilogram 50.80 kilograms 1016 kilograms 1.016 metric tons 6.45 square centimetres 0.092 ,, metres 16.38 cubic centimetres 0 .028 ,, metres 0 .07 kilogrammes per square centimetre 4.88 kilogrammes per square metre 95