Example.—What is the velocity acquired at the end of seven seconds?
32·1666 × 7 = 225·1662 feet.
3. The velocity in feet per second that a body will acquire, in falling through a given space, equals the square root of the product of the time multiplied by 64·3333.
Example.—The space through which a body has fallen is 201 feet; required its velocity at the end of the fall?
√64·3333 × 201 = √12931 = 1137 feet.
SPECIFIC GRAVITIES OF SEVERAL SOLID, AND FLUID BODIES.
| Air,[54] in a mean state | 1·232 | Pitch | 1150 |
| Brass, cast | 8000 | Sand[54] | 1520 |
| Brick | 2000 | Silver, standard | 10535 |
| Coal[54] | 1250 | Steel | 7850 |
| Copper | 9000 | Stone, common | 2520 |
| Cork | 240 | Tin | 7320 |
| Clay | 2160 | Water,[54] rain | 1000 |
| Earth, common | 1984 | sea | 1030 |
| Flint | 2570 | Wood—alder | 800 |
| Gold, standard | 18888 | ash, the trunk | 845 |
| Gun metal | 8784 | beech | 852 |
| Gunpowder—solid | 1745 | elm, and larch | 540 |
| ” loose | 868 | fir, Riga, & maple | 750 |
| Granite | 3000 | pine, pitch & red | 660 |
| Iron, cast | 7425 | oak | 950 |
| Lead | 11325 | walnut | 671 |
These numbers represent the weight of a cubic foot (or 1728 cubic inches) of each of the bodies in ounces (avoirdupois).
To find the magnitude of any body from its weight.
As the tabular specific gravity of the body
is to its weight in avoirdupois ounces;
so is one cubic foot (or 1728 cubic inches)
to its content in feet, or inches, respectively.