Rhineland or Prussian foot: = 12356 inches, 4 68038 English miles, 2'44291 3'55739 3-87818 I '09190 0.67028 Constants relating to Gravity. Constant. Log. Cubic inch of distilled water at 62°F. in grains, 252.458 2°40219 2-99883 Cubic foot of distilled water at 60° F. in oz. av., 997'31 Cubic inch of mercury at 32° F. in grains, . in lbs. av., 049125 69131 Barometric inches (32° F.) into lbs. per. sq. in. 0.49125 1.69131 Barometric millimetres (32° F.) into kilo- } 000136 3·13341 grammes per sq. centimetre, . Kilogrammes per sq. centimetre into lbs. 14:22263 1-15298 0.13825 I'14067 Francs per hectare into £ sterling per acre,. |