830 



On the basis of the results of the last three calibrations 1 have 

 now computed a new interpolation-lable, in which the resistance- 

 ratio is given from 56°K.to9l°K. for every degree and from 90° K. 

 to 270° K. for every live degrees. This table ought to replace the 

 one given by Siemens and at the same time for temperatures below 

 80°K. supplement the full table computed by Hennjng '). This addition 

 may be useful, although it must not be forgotten, that exactly in 

 the range below 80° K. the platininii-thermometer gives rise to 

 special difficulties '). 



I) F. Henning Ann. d. Phys 4Ü, p. 635, 1913. 

 -) Gomp. Gomm. Leiden 141tt § 6. 



