RESEARCHES IN MAGNETISM. 
559 
Ratio of residual 
to induced. 
070 
0-165 
0-95 
0-172 
1-36 
0-183 
1-68 
0-353 
2-31 
0-537 
275 
0-577 
321 
0-671 
378 
0729 
4-62 
0-774 
5-35 
0-803 
6-41 
0-818 
715 
0-825 
870 
0-829 
§ 40. The following series of determinations of total and residual magnetism 
was made by the direct magnetometric method with another annealed iron wire, 
0'078 centim. in diameter, and 28'7 centime, in length. The results are given 
numerically in the table below. Here the maximum in the ratio was 0’906, but the 
subsequent falling off in its value was less than in the former case (§ 38), as the 
magnetising force was not raised so far. 
3 
induced. 
3 
residual. 
Ratio of 
residual to 
induced. 
0-86 
26 
6 
0-250 
1-48 
67 
26 
0-381 
1-98 
164 
96 
0-598 
2-66 
478 
378 
0-793 
3-24 
680 
574 
0-843 
3-78 
802 
696 
0-868 
429 
888 
786 
0-884 
4-86 
956 
859 
0-899 
5-40 
991 
898 
0-906 
6'05 
1036 
918 
0-890 
6-81 
1067 
946 
0-883 
7-56 
1100 
966 
0-881 
9-29 
1142 
997 
0-873 
11-20 
1166 
1014 
0-868 
12-64 
1180 
1023 
0-868 
14-59 
1196 
1033 
0-863 
15-49 
1203 
1034 
0-861 
17-24 
1212 
1042 
0.859 
In another experiment the ratio of residual to induced magnetism in an annealed 
iron wire passed a maximum of 0‘885 with <§ = 6, and fell to 0'779 with .§=90. 
§ 41. Another very extensive series of observations of this ratio was made on the 
annealed iron wire of § 31, both before and again after it was hardened by stretching, 
4 C 2 
