Lyons — Volume Change on Fusion. 



71 



On heatiug, it did not become clear till a temperature of 58'5° 0. (/) was 

 reached. 



Conclusions. 



It was found in all cases that the process of fusion, as shown by the 

 appearances in the wax, and by the irregularity of tlie curve, lasted over a 

 considerable range of temperature. A marked loop in the curves indicates a 

 considerable "lag" effect between the volumes on cooling and heating during 

 the fusion stage. Tiiis effect is reduced by making the temperature alter very 

 slowly, but it does not disappear, even when a very long interval of time 

 is allowed to each temperature. The loop in tlie case of Bees' Wax is very 

 marked, and was repeated with regularity on taking the wax through several 

 cycles of temperature. 



SCIENT. PROO. R.D.S., VOL. XHI., NO. V. M 



