1904-5.] Apparatus for Measuring Lateral Strains. 455 
Longitudinal Strain. 
Lateral Strain. 
Load 
Pounds. 
Reading. 
A 
Reading. 
A 
1,000 
0 
-34 
0 
- 20 
3,000 
34 
-32 
20 
-22 
5,000 
66 
-33 
42 
~ 21 
7,000 
99 
- 33 
63 
-22 | 
9,000 
132 
-33 
85 
-21 
11,000 
165 
106 
0 
0 
0 
The values of C and D are respectively 12,378,000 and 
20,603,000, with the same units. 
As a further example we may quote the case of a wrought-iron 
bar in tension, having a diameter of 1 inch, the test being similar 
to the one previously described. The readings obtained were — 
Load 
Pounds. 
Longitudinal Strain. 
Lateral Strain. 
Reading. A 
Reading. A 
1,000 
0 
0 
-37 
-25 
3,000 
37 
25 
-35 
-25 
5,000 
72 
50 
-34 
-25 
7,000 
106 
75 
-37 
-24 
9,000 
143 
99 
-36 
-25 
11,000 
179 
124 
-36 
-22 
9,000 
143 
102 
-35 
-24 
7,000 
108 
78 
-36 
-24 
5,000 
72 
54 
-35 
-25 
3,000 
37 
29 
-37 
-25 
1,000 
0 
4 
