H. KAMERLINGH ONNES. ‘Further experiments with liquid helium”. 
Ply DE 
3.0 
eee = | 
fog px7e 
UE eN | 
oz 03 OY as Oo 07 oë8 
Fig. 1. Vapour pressure of helium. 
rrd ES ls 
5° 30° 35° 20° 257 
Fig. 3. Resistances of platinum. 
Proceedings Royal Acad. Amsterdam. Vol. XII. 
