measures into English and _vice versa_ may be useful. The unit of length
is the _metre_ (equal to 39.37 inches); it is divided into tenths
(decimetres), hundredths (centimetres), and thousandths (millimetres),
and it is multiplied by decimals in like way into hectometres,
kilometres, and myriometres. The unit of weight is the _gramme_, divided
as the metre into decigrammes, centigrammes, and milligrammes;
multiplied into decagrammes, hectogrammes, and kilogrammes. The unit of
capacity is the _litre_, divided and multiplied like the others.


1 inch equals 2-1/2 centimetres.
1 foot equals 3 decimetres.
1 mile equals 1-3/5 kilometres.
1 cwt. equals 50.8 kilogrammes.
1 ounce (troy) equals 31 grammes.
1 pound (troy) equals 3.72 decagrammes.
1 gallon equals 4-1/2 litres.
1 quart equals 1-1/16 litres.
1 metre equals 39.37 inches.
1 hectometre equals 109-1/3 yards.
1 cubic metre equals 61,027 cubic inches.
1 kilometre equals 1,093 yards.
1 decigramme equals 1-1/2 grains.
1 gramme equals 15 grains.
1 kilogramme equals 2-1/5 pounds (avoirdupois).
1 litre equals 1-3/4 pints.


To turn inches into millimetres add the figures 00 to the number of
inches, divide by 4, and add the result two-fifths of the original