A Table of Specific Gravities
The comparative weights of metals, woods and waters, as given for the shipbuilder.
A TABLE OF SPECIFIC GRAVITIES
| Lead | 11,325 |
| Fine Copper | 9,000 |
| Gun Metal | 8,784 |
| Fine Brass | 8,350 |
| Iron from | 7,827 to 7,645 |
| Cast Iron | 7,425 |
| Sand | 1,520 |
| Lignum Vitae | 1,327 |
| Ebony | 1,177 |
| Pitch | 1,150 |
| Rosin | 1,100 |
| Mahogany | 1,063 |
| Box Wood | 1,030 |
| Sea Water | 1,030 |
| Tar | 1,015 |
| River Water | 1,009 |
| Rain Water | 1,000 |
| Oak | 925 |
| Ash | 800 |
| Beech | 700 |
| Elm | 600 |
| Fir | 548 |
| Cork | 240 |
| Common Air | 1,232 |
These numbers being the weight of a cubic foot, or 1,728 cubic inches, of each of the bodies in avoirdupois ounces; by proportion the quantity in any other weight, or the weight of any other quantity, may be readily known.
For Example.--Required the contents of an irregular piece of oak, which weighs 76 pounds, or 1,216 ounces.
Sp. gr. Oz. wt. oz. cub. in. cub. in.
Here as 925 1,216:: 1,728: 2,271=1 ft. 543 inches cubic, the contents.