£50 
Iron . 
3d — 
3-087 
3 
628$ 
<b -pounder shot, 1st 
3-240 
5 
4813 
2d — 
3-240 
5 
503 L 
3d 
3-290 
5' 
5250 
9-pounder shot, 1st — 
4-032 
8 
5906- 
2d — 
4-050 
8 
6016 
3d — 
— 4*090 
8 
6236 
12-pounder shot, 1st — 
- — 4*440 
ir 
5250 
2d 
— 4*444 
ii 
5480 
3d 
4*512 
ii 
5781 
24-pounder shot, 1st — 
5.556 
23 
3830 
2d 
5-574 
23 
4485 
3d 
5-666 
23 
5690 
32 -pounder shot, 1st — 
6.114 
31 
5360 
2d 
6*156 
31 
6343 
3d 
6.268 
32 
1530 
Upon this table 1 have only ta remark, that the ratio of 
effect, both, in the expansion and increase of weight, is : 
exactly analogous to the weight or diameter of the ball* 
or, in other words, to the mass of fluid iron poured into 
the mould. When the last round of pouring was finish^ 
ed, the moulds possessed a temperature respectively to 
their sizes. The 32pounder mould was thoroughly red- 
hot,, though, nearly two inches in thickness and weighing 
140 pounds^ In this and in the 24-pounder mould a cu- 
rious species of adhesion had taken place in the bottom^ 
betwixt the shot and the mould, by the moulders called 
burning, When the bullet is broken off, the mould ex- 
hibits am elevated' spongy mass which resists the hardest 
tempered steel. 
About two years after the above experiments were made, 
1 paid particular attention to the effects likely to be pro- 
duced in a large way in the usual train of manufacture. 
My observations were conducted in a shop appropriated 
for shot-casting. The length of the house was 30 feet.. 
