Pocketbook of Useful Formulæ and Memoranda
for Civil and Mechanical Engineers

605 OF ENGINEERING F0RMULÆ. Metrical Equivalents (Weights and Measures Act 1878). LINEAR MEASURES. Métres. Reciprocals. Inch __________= -02539954 .. 39-37079 Foot __________ = -3047945 .. .. 3’280899 Yard .......... = -91438348 .. .. 1’093633 Pole __________ = 5’029109 .. -1988424 Chain __________ = 20'11644 .. .. -0497108 Furlong,. .. = 201-1644 .. .. •0049?l Mile .......... = 1609'3149 .. -00062138 SQUARE MEASURES. Square metres. Reciprocals. Square inch .. .. = -000645137 .. .. 1550-591 „ foot .. .. = ’09289968 .. .. 10’7643 „ yard .. .. = *836097 .. .. 1-196033 Perch ..........= 25 • 29194 .. -0395383 Rood ... .. .. =101P678 .. .. -00098846 Acre .......... =4046'71 .. .. -00024711 Square mile .. .. =2589894’5 .. .. •00000038612 CUBIC MEASURES. Cubic metrea. Reciprocals. Cubic inch .. .. = •000016386 .. .. 61027-05 „ foot .. .. = ’0283153 .. ... 35-31658 „ yard .. .. = •1&1513 .. .. 1-30802 MEASURES OF CAPACITY. Litres. Reciprocals. Grill..............= >141983 .. .. 7-043094 Pint..............= *56793 .. .. l-t60773 Quart .......... = 1'13586 .. .. -8803868 Gallon.......... = 4*543457 .. *2200967 Peck .......... =e 9-086915 .. '1100483 Bushel..........= 36-34766 .. .. -027512 Quarter __..............= 290-?813 .. .. -003439 Drachm avoirdupois Ounce ,, Pound „ Hundred-) weight f ” Ton „ Grain Troy .. . . Penny-) weight) ” • ’ ' ’ Ounce „ .. .. Pound „ .. .. WEIGHTS. Grammes. = 1*771836 .. = 28-349375 .. = 453-59265 .. = 50802-38 .. = 1016047-5 .. = •06479895 ., = 1’555175 .. — 31-1034615 .. = 373-2419 .. Beciprocals. •564383 •0352739 •00220462 •00001968 •000000984 15-43235 •6430146 •03215073 •00267923