H. KAMERLINGH ONNES and C. A. CROMMELIN : " On the measurement of very low tempera- 

 tures. V. Improvements of the protected thermoelements; a battery of standard-thermoelements 

 and its use for thermo-electric determinations of temperature." 



Plate II. 



iï 



S- 



nil 



Si.. 



s= 



U UAJ 



A, 



nin 



4, 



UAJ 



\r^\ 



■ V\AWV\- 



A, 



LUJ 



W 



(Si. 



A 



ODéjbn baL-t. 



X 



nlfl 



ace 



n 



-AAAAAAA^ 



111 



a, 



Proceedinofs Roval Acad. Amsterdam. Vol. VI. 



