152 ILLINOIS ACADEMY OF SCIENCE 



THE SUPPOSED EFFECT OF THE SHAPE OF THE 

 CONTAINER ON THE VOLUME OF A GAS 



ABSTRACT 



W. A. Noyes and L. C. Johnson, University of Illinois 



From a discrepancy between his earlier values for the ratio 

 of hydrogen to oxygen in water, Morley assumed that the 

 shape of the vessel in which the gas was measured might 

 actually affect the volume. In this investigation, both hydro- 

 gen and oxygen have been measured in tubes and in bulbs 

 and the results show that any difference in volume which may 

 exist is much too small to account for the disagreement as 

 reported by Morley. 



(Complete paper published in the Journal of the American 

 Chemical Society, Vol. XXXVIII, No. 5, May, 1916.) 



MAGNETIC PERMEABILITIES OF 50000 

 Trygve D. Yensen, University of Illinois 



Ten or fifteen years ago we used to read about great im- 

 provements being made in iron for magnetic purposes, due 

 chiefly to the excellent work done by Sir Robert Hadfield. 

 He succeeded in raising the maximum permeability of Swed- 

 ish charcoal iron, at that time regarded as the best magnetic 

 iron obtainable, from 2000 to 5000 by alloying it with small 

 percentages of silicon or aluminum. Furthermore, the area 

 of the hysteresis loop, or the hysteresis loss, was proportion- 

 ately reduced, at the same time as the electrical resistance 

 was enormously increased by the addition of either one of 

 these alloying elements. As Hadfield's alloys could be read- 

 ily produced in commercial quantities it was not surprising 

 that his discoveries resulted in the almost immediate adoption 

 of silicon steel for transformers, in which efficiency and high 

 permeability are of the utmost importance. 



Since that time only minor improvements have been made, 

 and whatever has been done has been due largely to modifica- 

 tions of Hadfield's alloys. Even in the laboratory maximum 

 permeabilities above 10000 have been obtained only in very 



