Chapter XIX: Appendix: J

WEIGHT OF CASTINGS COMPARED WITH WOOD PATTERNS

The following table shows what the weight of a casting will be compared with the weight of the wood pattern from which it was made, less the weight of the _core point_, or piece projecting from the pattern to support it.

===============+===============================================
A Wood Pattern |
Weighing | Will Make a Casting Weighing
One Pound |
---------------+-----------+--------+--------+--------+--------
Pattern of | Cast Iron | Brass | Copper | Bronze | Zinc
| Pounds | Pounds | Pounds | Pounds | Pounds
---------------+-----------+--------+--------+--------+--------
Pine | 14 | 15.8 | 16.7 | 16.3 | 13.5
Beech | 9.7 | 10.9 | 11.4 | 11.3 | 9.1
Oak | 9 | 10.1 | 10.4 | 10.3 | 12.9
Birch | 10.6 | 11.9 | 12.3 | 12.2 | 10.2
Mahogany | 11.7 | 13.2 | 13.7 | 13.5 | 11.2
Brass | 0.84 | 0.95 | 0.99 | 0.98 | 0.81
---------------+-----------+--------+--------+--------+--------