76 VII. AMERIKANISCHE MAASSE UND GEWICHTE 1 1 1 1 1 1 1 1 1 1 1 1 1 1 foot inch yard english mile . . . square inch . . . square foot . . . acre cubic inch .... cubic foot pound hundred weigths . , ton pound per square inch pound per cubic foot . = 30,480 cm — 2,540 cm = 91,440 cm = 1609,330 m = 6,451 cm= = 929,0137 cm’ = 40,4678 a = 16,387 cm® = 28316,084 cm® = 453,6 g = 50,8 kg = 1016,04 kg = 0,07031 kg/cm’ ^ 16,015 kg’