92 Mr. R. H. M. Bosanquet on the Magnetic 
Hiquations. 
k 60°—o@8 
p=A(B. —$) COs 6, 6=/0, 3 = p Tras. 
Ring E. ='3856 (17,500 —B) cos 6, 
log’ = 2°32208, log f='16153. 
38 4) O. i Diffs 
Cale. Obs. 
@) 1 (e) 1 
129°7 59 28 86 16 436 A37 — 1 
939-1 59 2 86 4 AD7 493 — 36 
2174:3 51 51 75 13 1508 1474 + 34 
3187 48 36 70 30 1842 1817 + 25 
5182 A 7 62 33 2190 2163 =k 
6403 40 17 58 26 2235 2234 + 1 
7208 38 37 56 10 2210 2206 + 4 
11516 Bil 25) 45 34 1615 1615 6) 
13276 29 Mal: 42, 20 1204 1382 —178 
14017 28 20 41 6 1012 1047 — 39d 
15000 97 16 40 8 io 635 +102 
163880 25 55d at 25 342 218 +124 
17245 1 24°53 36 «6 719 117 — 38 
J. Soft Steel. fe=11 (20,000—B) cos 4, 
k eu x 
Og eae log f="17595. 
[le 
33. 0. é. eR eel | DET, 
Cale. Obs. 
il ) 1 dl 
57-6 | 59 59 567 | 8958 5 | 1223 | 123 ae, 
DHT Of 59 59 45°7 89 57 50 337 156 — 19 
1826 59 58 28 89 5d 52 240 248 — § 
2367 59 58 00 89 55 16 267 949 + 18 
8517 59 57 2 89 53 46 329 314 + 15 
5816 59 55 6 89 50 53 414 420 so 6 
9468 59 52 2 89 46 19 A461 461 0 
11497 59 50 19 89 43 41 444 443 + 1 
12443 59 49 31 89 42 29 474 326 +102 
15352 59 47 5 89 38 53 314 154 +160 
18597 59 44 20 89 34 Al 114 90 + 24 
Here %,, is a little overestimated. Probably 19,500 would 
be nearer the mark. 
A is the permeability of the molecules themselves per unit 
defect of saturation. For, putting 6=d=0, or supposing the 
