Yo? 
of auxiliary thermometers of platinum and of gold which had been 
compared directly with Pé. 
The data for the gold thermometer Av), which was used in the 
measurements of May —June 1915 (table IV), were inserted in Comm. 
N°. 142a § 4e. Table I contains the data for the gold thermometer 
Art. which was used in June—July 1914. 
TABLE 1. 
Resistance of Au a 2) RSPAS 
T ae in £ ~~ constantin 
| WR; WR || Const. C3 
14.16°K. 0.6148 0.00 | 0.00 | 136.621 
| 15.79 gese — te | A | 918 
| 17.00 e419 | — 14 | 0 | 137.138 
| 17.96 6542 | — 14 | 0 | 312 
19.35 6140 | — 8 | 0 | 565 
| 20.31 6911 0 0 | 743 
20.48 eng | Sh eh Se 716 
68.22 2.6093 | | | 143.388 
78.28 | 3.0917 | | | 144.000 
90.27 | 3.6549 | | | 656 | 
We also communicate in table II the calibration data of a gold 
thermometer Av, which became defective in some measurements 
concerning the specifie heat of aluminium. 
In connection with a remark by ZeRNIKE in a paper published 
in these Proceedings, viz. that the resistance of Av, (Comm. N°. 142a $ 42) 
for the range of hydrogen temperatures can be represented fairly 
accurately by a formula 
Wan ne a ee 
we have inserted under W_— ZR; in the tables I and II the differences 
between the observed temperatures and those calculated from the 
resistances with the formulae: 
W = 0.5912 +- 5.871.107. 7 (Au). 2 Ze 
W = 0.07279 + 1.0974 .10~7. T* (Aun) … (26) 
In Fig. 8 we have represented besides these deviations (indicated 
by squares and triangles respectively), also those of Au, (indicated 
by circles), for which 7 was calculated from 
1) Wire of 0.05 mm. of HERAEUS. 
2) Wire of 0.1 imm. furnished in January 1914 by Heraeus. 
