OF HOT-EOLLED AND COLD-EOLLED MALLEABLE lEON. 
283 
Experiment 17, March 24, 1**. 
Immediately after the last examination, the bars were placed on the wood of the 
equatorial plane, lettered end downwards, and were struck with the wooden mallet very 
lightly, the mallet being lifted about 2 inches, each bar three times. As soon as the 
series of blows was finished, the bars were struck again in the same manner. They were 
then immediately examined. 
Hot-rolled 
Hot-roUed 
Cold-rolled 
Cold-rolled 
longitudinal. 
transversal. 
longitudinal. 
transversal. 
No. 
Diff. 
readings. 
No. 
Diff. 
readings. 
No. 
Diff 
readings. 
No. 
Diff. 
readings. 
1 
o / 
— 11 5 
7 
— 11 45 
13 
— 17 40 
19 
— 11 20 
2 
-10 15 
8 
— 11 10 
14 
-15 5 
20 
-14 15 
3 
- 7 5 
9 
— 10 15 
15 
— 13 30 
21 
— 7 55 
4 
— 10 30 
10 
— 9 45 
16 
— 11 55 
22 
— 11 45 
5 
— 11 5 
11 
- 9 50 
17 
i —12 50 
23 
-19 0 
6 
- 9 10 
12 
-11 30 
18 
— 15 50 
24 
-20 50 
Sum... 
-59 10 
Sum... 
-64 15 
Sum... 
— 86 50 
Sum... 
— 85 5 
Total sum . . . — 295° 20'. 
The bars were placed on the wood of the equatorial plane, lettered end upwards. 
Experiment 18, March 24, 2'’. 
The bars on the wood of the equatorial plane, lettered end upwards, were struck 
with the mallet, each bar three times, the mallet being raised more than 1 foot ; and 
the series of blows was then repeated. The bars were examined immediately. 
Hot-rolled 
longitudinal. 
Hot-rolled 
transversal. 
Cold-rolled 
longitudinal. 
Cold-rolled 
transversal. 
No. 
Diff. 
readings. 
No. 
Diff. 
readings. 
No. 
Diff. 
readings. 
No. 
Diff. 
readings. 
1 
O 
— 1 
45 
7 
O 
— 3 
30 
13 
0 
1 
5 
19 
+ 
O 
1 
30 
2 
— 2 
0 
8 
— 1 
5 
14 
+ 
0 
50 
20 
— 
1 
5 
3 
— 2 
5 
9 
— 0 
35 
15 
— 
3 
10 
21 
+ 
3 
45 
4 
— 1 
25 
10 
- 0 
5 
16 
— 
2 
15 
22 
+ 
1 
20 
5 
— 1 
10 
11 
- 0 
5 
17 
— 
0 
55 
23 
— 
3 
35 
6 
— 0 
15 
12 
— 0 
40 
18 
+ 
0 
10 
24 
— 
0 
15 
Sum... 
— 8 
40 
Sum... 
- 6 
0 
Sum... 
— 
6 
25 
Sum... 
+ 
1 
40 
Total sum . . . — 19° 25'. 
The bars were returned to the wood of equatorial plane, lettered end upwards. 
2q2 
