124 
Mr. Rennie's account of experiments 
Castings , Horizontal. Specific gravity 7.1 13. 
Averages, 
I ± X ± 
1°1 H <1 l 
4*4 
U x i 
lbs. avoirdupoise, 
IO432 
- IO72O 
10605 
8 699 
Vertical castings. Specific gravity 7.074. 
Ti x i bottom of vertical bar 
11 
13675 < * 
- , 12665 
10950 
11088 
9844 
I i x ^ full size. Scale broke with 10294; 
[_ tried again - - 11006 
4 x 4 
x x i 
4 A 4 
X x X 
A prism, having a logarithmic curve for its limits, resem- 
bling a column ; it was ^ of an inch diameter by one inch 
long, broke with - 
6954. 
April 28th. Trials on prisms of different lengths. 
1* x x x horizontal 
- 9455 
ditto 
- 9374 
ix{ ditto, bad trial, 9006 lbs. 
_ vertical - 
0982.5 <! . j 
li x 4- ditto - - - 1 - 
9938 
•- 10027 
