836 Miss M. B. Moir on Magnetic Properties of a 



It will be noted that for low fields the curves are coincident, 

 though for higher fields V lies above I. The residual 

 magnetism at both temperatures is about 400 c.G.s. units, 

 and the coercive force about 5 c.G.s. units. The dotted 



curve marked II is the hysteresis curve of the quenched 

 specimen at 15° C. To prevent confusion of the diagram, 

 the curve taken at —190° C. is not shown, but it very nearly 

 coincides with II. The values of the residual magnetism at 

 15° C. and -190° C. are respectively 600 and 605 c.G.s. 

 units, and the values of the coercive force 28 and 33 c.G.s. 

 units. 



Specimen II. (4*05 per cent. Cr.). — The results obtained on 

 testing this specimen are contained in Table II. These 

 readings and the corresponding curves of fig. 3 show that 

 this specimen is magnetically very similar to the previous 

 one except in one or two points. As before, the curve taken 

 at —190° C, when the specimen is in the annealed condition, 

 starts below and finishes above the curve taken at 15° 0., but 

 in this case the crossing occurs for a much higher field value, 



