on the strength of materials. 
129 
On twists of different lengths . 
No. Horizontal. Weight in scale. 
74 £ by i lon g - - 7 3 
75 J by f do. ~ - - - 81 
76 ^ by 1 inch do. - - 8 8 
Vertical. 
77 i b y i do. - - - 101 
78 i by l do. - - - 89 
79 T by 1 inch do. - - 8 5 
Horizontal twists at 6 from the bearing. 
80 ^ by 6 inches long - - 109 
81 - by do. do. - - “94 
82 ~ by do. do. - "97 
Twists of inch square bars, cast horizontally. 
qrs. lbs. oz. 
83 f close to the bearing 3 912 end of the bar hard. 
84 \ do. - - 2 18 o middle of the bar. 
85 -j at 10 inches from bearing,! 2 Q 
lever in the middle J 
On twists of different materials. 
These experiments were made close to the bearing, and 
the weights were accumulated in the scale until the sub- 
stances were wrenched asunder. 
86 Cast steel 
- 
- 
19 
9 
87 Shear steel 
- 
- 
17 
1 
88 Blister steel 
- 
16 
11 
89 English iron, No. 1. 
- 
- 
10 
a 
MDCCCXVIII. 
S 
