280 3IE. G. B. AIEY ON THE DIFEEEENCE IN THE MAGNETIC PEOPEETIES 
Experiment 10, February 15, l'^. 
The bars had been lying undisturbed on the equatorial plane, lettered end doum- 
wards. 
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 
+ 11 20 
7 
+ 12 6 
13 
+ 11 30 
19 
+ 15 45 
2 
+ 11 25 
8 
+ 9 55 
14 
+ 13 5 
20 
+ 12 50 
3 
+ 10 20 
9 
+ 9 45 
15 
+ 7 55 
21 
+ 17 5 
4 
+ 6 40 
10 
+ 10 30 
16 
+ 7 5 
22 
+ 16 55 
5 
+ 9 40 
11 
+ 10 35 
17 
+ 10 25 
23 
+ 6 55 
6 
+ 7 30 
12 
+ 9 50 
18 
+ 9 20 
24 
+ 95 
Sum... 
+ 56 55 
Sum... 
+ 62 35 
Sum... 
+ 59 20 
Sum... 
+ 78 35 
Total sum . . . -)-257° 25'. 
No specific cause is known for this decided decrease of magnetism. 
The bars were returned to the flagstone equatorial plane. 
Experiment 11, February 15, 2*^. 
The bars, lying on the flagstones of equatorial plane, with lettered end downwards, 
were struck each in the middle of its length, with a single blow of the light hammer. 
The hammer was raised about 18 inches. 
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 t 
+ 1 20 
7 
+ 0 35 
13 
— 4 20 
19 
+ 3 25 
2 
— 0 20 
8 
— 0 25 
14 
— 1 10 
20 
— 1 40 
3 
— 0 35 
9 
— 0 55 
15 
— 5 55 
21 
+ 3 50 
4 
-3 0 
10 
-0 55 
16 
— 5 5 
22 
+ 0 15 
5 
+ 0 30 
11 
— 0 20 
17 
- 2 35 
23 
— 5 30 
6 
— 1 20 
12 
— 1 35 
18 
— 2 25 
24 
-5 30 
Sum... 
-3 25 
Sum... 
— 3 35 
Sum... 
-21 30 
Sum... 
— 5 10 
Total sum . . . — 33° 40'. 
The bars were returned to the flagstones of equatorial plane, lettered end downwards. 
