1J74 



10^ «»= 1059.5 — 8670 7' 4- 4.111 7'* .... (10) 

 The differences between the ol)seived and the calculated values 



I'^ig- 3. 

 of ir do not rise beyond 1.7 .10—'', which is less than 2 7o» of tlie 

 vahie of the resistance (comp. table VI; in column the value of 

 in is given according to the measurements, in column C the value 

 derived from (10)). 



By means of this formula and of a curve of deviations w,^ was 

 calculated for the temperatures at which measurements had been 

 made for the other wii-es. The results of the comparison will be 

 found in table VII. 



B. Gold. 



Table VIII gives the difference htv = iv^, — ?r,, between the two 

 gold wires Au — 11 (this wire is also called Aiii 1915 and after- 

 wai-ds Aiixi) and An — 12 (this wire is also called Aii^ 1915 and 

 afterwards Aiixii) togelher with the value of(l — ?/',,). The corre- 

 sponding curve representing A?/; as a function of (1—?/?,,) will be 

 found as B in fig. 1. 



The curve shows a bend at about 210°. 



