225 
1914 - 15 .] Magnetic Quality and Transverse Pressure. 
appreciable difference between these. Demagnetisation was also carried 
out between each of these various readings. There is a possibility, of 
course, that the irregularity was due to the development of a small cavity 
in the interior of the test piece, which cavity became closed up on further 
compression. The probability of this is rather remote, however. 
In conclusion, the author desires to express his thanks to Professor 
Peddie for much encouragement and advice given during the course of 
the work. 
Table I. — Cast Iron. 
Dimensions = 13*908 mm. x 13*413 mm. 
Compression, 
Box Resistance 
tons per 
Deflections. 
Differences. 
in Secondary- 
Amperes. 
square inch. 
Circuit. 
Right. 
Left. 
27-4 
21*8 
5*6 
f 
•44 
29-8 
19*5 
10*3 
•83 
32*5 
17*0 
15*5 
1-54 
34-3 
15*4 
18*9 
2-11 
0 
35- 5 
36- 6 
14*4 
13*2 
21*1 
23-4 
500,000 
ohms 
o o 
37-5 
12*4 
25*1 
4*01 
38-2 
11*8 
26*4 
4*69 
40-6 
10*6 
30*0 
6*00 
41*2 
10*2 
31*0 
6*64 
41*3 
9*0 
32*3 
\ 
7*33 
Dimensions = 14'576 x 12‘800 mm. 
r 
26-5 
22*8 
3*7 
~\ 
*63 
28-4 
21*1 
7*3 
*97 
31-0 
19*0 
12*0 
1*65 
330 
17*3 
15*7 
2*24 
34-6 
16*1 
18*5 
2*83 
10 
36-3 
14*8 
21*5 
500,000 
3*75 
37-0 
14*3 
22*7 
ohms 
4 17 
37-7 
13*7 
24*0 
4*70 
38-4 
13*0 
25*4 
5*23 
38-9 
12*5 
26*4 
5*75 
39-5 
11*6 
27*9 
6*53 
40-2 
10*8 
29*4 
7*40 
y 
VOL. XXXV. 
15 
