Water.
| Maximum density 42 deg. Fahrenheit. | ||
| 1 cubic foot of water | 6¼ imperial gallons. | |
| 1 cylindric foot do. | about | 5 do. |
| 1 cubic foot | weighs | 62·5 lb. avoirdupois. |
| 1 cylindric do. | do. | 49·1 |
| 1 lineal do. (1 in. square) | do. | ·434 |
| 12·2 imperial gallons | weigh | 1 cwt. |
| 224 do. | do. | 1 ton. |
| 1·8 cubic feet | do. | 1 cwt. |
| 35·84 do. | do. | 1 ton. |
MEASURES OF CAPACITY.
| 69⅓ | cubic in | 2 | pints | 1 | quart. | |||||
| 277¼ | 8 | 4 | 1 | gallon. | ||||||
| 554½ | 16 | 8 | 2 | 1 | peck. | |||||
| 2218⅕ | 64 | 32 | 8 | 4 | 1 bushel. | |||||
| 10¼ | cubic ft. | 512 | 256 | 64 | 32 | 8 1 quarter. |
FRENCH MEASURES.
| English | English | ||
| cubic inches. | feet. | ||
| Metre | 3·281 | ||
| Millilitre | ·06103 | ” French feet, 3·07844 | |
| Centilitre | ·61028 | Millimetre. | ·03937 |
| Decilitre | 6·10279 | Centimetre | ·39371 |
| Litre, or cubic decimetre | 61·02791 | Decimetre | 3·93708 |
| Decalitre | 610·27900 | Metre | 39·37079 |
| Hectolitre | 6102·79000 | Decametre | 393·70790 |
| Kylolitre | 61027·90000 | Hectometre | 3937·07900 |
| Myrialitre | 610279·00000 | Kilometre | 39370·79000 |
| 1 litre is nearly 2⅛ wine pints. | Myriametre | 393707·90000 | |
| 1 kilolitre 1 tun 12¾ wine gallons. | 8 kilometres are nearly 5 miles. | ||
| 1 stere, or cubic metre | 35·3171 | 1 inch is ·0254 metre. | |
| 100 feet are nearly 30·5 metres. | |||
INVOLUTION.
Involution is the raising of powers from any given number, as a root.
A Power is a quantity produced by multiplying any given number, called the Root, a certain number of times continually by itself. Thus, 2 × 2 = 4, the 2nd power, or square of 2, expressed thus, 22.