242 Presents. [Jan. 17, 



heated to redness and quenched in oil at 14 C. Ifc was found that this 

 hardening process increased the resistance 4 per cent, and 7 per cent, 

 in different samples. 



APPEXDIX III. 



This effect may be illustrated by an example. A transformer was 

 kept in a tank of heated oil, the temperature of which was kept between 

 110 and 140 C. Headings of its loss were taken occasionally as 

 below, the magnetisation being the same in all cases, the current 

 being applied only at the time and for the purpose of the test. 



This test has not yet been in progress long enough to show the 

 slow rise very clearly. 



Watts. 



On immersion 33*13 Jan. 1, 1895. 



After 20 minutes 32'19 



40 32-1 



1 hour 32'0 



Jan. 29, 1895. 



Presents, January 17, 1895. 

 Transactions. 



Adelaide : Royal Society of South Australia. Transactions and 



Proceedings. Vol. XVIII, for 1893-94. 8vo. Adelaide 



1894. The Society. 



Baltimore : Johns Hopkins University. Circulars. Vol. XIV. 



No. 115. 4to. Baltimore 1894. The University. 



Berlin : Gesellschaft fur Erdkunde. Verhandlungen. Bd. XXI, 



No. 9. 8vo. Berlin 1894 ; Zeitschrift. Bd. XXIX. No. 5. 



8vo. Berlin 1894. The Society. 



Briinn: Naturf orschender Verein. Verhandlungen. Band XXXII. 



1893. 8vo. Briinn 1894. The Society. 



Brussels: Academie Royal de Medecine. Memoires Couronnes. 



Tome XIII. 8vo. Bruxelles 1894. The Academy. 



