M^ 



e. Gold. With a view to measurements of specific heats, wliich 

 will be published before long and to investigate tiie suitability of the 

 gold-thermometer in the region of oxygen- and hydrogen-temperatures, 

 we determined the resistance of a gold wire at a great number of 

 temperatures in those regions.^) The result shows, that in tiie region 

 of the reduced-oxygen temperatures (mainly below — 200° C.) the 

 gold thermometer does not give rise to the difficulties, which make 

 the platinum thermometer nearly worthless in that region (Comm. 

 N". 141r/ § 6 and tig. 2). 



1) Calibrations of olhor gold wires will be given in the paper by W. H. Keesom 

 and H. Kamerlikgh Oknes on specific heals Coram. N''. 143. 



