58 
MR. S. W. J. SMITH ON THE THERMOMAGNETIC ANALYSIS OF 
Fig. 15. Meteoric iron (2nd winding). 
Reheating to 850 rj C. interrupted between 700° C. and 800° C. 
Effect of subsequent cooling and reheating. 
(cf. 163 to 165, 173 to 175, and 178 to 180). It is noticeable, corroborating this 
view, that the readings at the air temperature (167 and 171) after continuous 
cooling are practically identical with previous values (cf. 48, 55, 72) obtained under 
similar treatment, while the values at 176 and 181 (after interrupted cooling) are 
each slightly larger, showing that the effect of reheating to a temperature in the 
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Fig. 16. Meteoric iron (2nd winding). 
Effect upon permeability of temperature change alternating between (i) 430° C. and 680° C., 
(ii) 15° C. and 625° C. 
