or HOT-EOLLED AOT) COLD-EOLLED MALLEABLE lEON. 
277 
netism of the opposite kind is left, but it is distributed very capriciously among the 
bars. It seems to have no relation to the former magnetism. 
The bars were immediately placed on the flagstones of the dip plane, with lettered 
end upwards, and were immediately struck with the same hammer and in the same 
manner as above, but were not examined on this day. 
Experiment 4, February 7, 22^. 
The bars had been resting on the flagstones of the dip plane since Feb. 7, 1^, with 
lettered end upwards, and without further disturbance were taken from it for examina- 
tion. 
Hot-rolled 
longitudinal. 
Hot-rolled 
transversal. 
Cold-rolled 
longitudinal. 
Cold-roUed 
transversal. 
No. 
Diff. 
readings. 
No. 
Diff. 
readings. 
No. 
Diff. 
readings. 
No. 
Diff. 
readings. 
1 
— 22 10 
7 
— 21 6 
13 
o / 
- 27 0 
19 
O / 
— 18 40 
2 
- 19 50 
8 
— 19 10 
14 
— 23 40 
20 
— 25 40 
3 
- 18 0 
9 
- 17 30 
15 
- 30 30 
21 
— 14 30 
4 
— 21 20 
10 
— 23 20 
16 
— 29 40 
22 
— 20 50 
5 
— 21 20 
11 
— 20 40 
17 
— 25 15 
23 
— 26 10 
6 
- 19 40 
12 
- 20 30 
18 
— 25 20 
24 
— 30 0 
Sum... 
— 122 20 
Sum... 
— 122 10 
Sum... 
-161 25 
Sum... 
— 135 50 
Total sum . . . —541° 45'. 
The bars were immediately returned to the flagstones of the dip plane, in the same 
position as before, with lettered end upwards, and were immediately struck for the next 
experiment. 
Experiment 5, February 7, 23*’. 
The bars on the flagstones of the dip plane, with lettered end upwards, were struck 
each with three blows, with the same hammer and with the same force as in Experi- 
ment 5. 
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 
— 21 20 
7 
0 / 
- 19 10 
13 
O / 
— 25 5 
19 
— 20 6 
2 
— 20 30 
8 
— 18 40 
14 
— 23 40 
20 
— 25 10 
3 
— 16 40 
9 
— 18 10 
15 
— 28 40 
21 
— 17 25 
4 
- 19 50 
10 
— 17 10 
16 
— 29 0 
22 
— 20 27 
5 
— 16 40 
11 
— 15 10 
17 
— 23 10 
23 
— 27 40 
6 
— 20 20 
12 
— 20 40 
18 
— 25 20 
24 
— 31 0 
Sum... 
— 115 20 
Sum... 
— 109 0 
Sum... 
— 154 55 
Sum... 
— 141 42 
Total sum . . . — 520° 57'. 
The magnetism of the bars is, upon the whole, slightly diminished. The bars were 
