1180 



determined in a sim[)le way. For this purpose the^ line is drawn so 

 that as many points as possible lie on this line, and that the others, 

 which deviate lie regularly on the left or the right of it. In this 

 ease the tangeiit of the angle <i formed by this line and the tempera- 

 ture axis, will give the constant. This is immediately seen in the 

 following waj'. 



For two different i>oints on this line we get namely: 



and 



lienee 



or 



l\h,l>^ 



60 

 56 

 5^ 

 H8 

 44 

 40 

 36 

 3Z 



R 



Q 



^■ cj\ 



TJnp., = - + CT.. 



(4) 



(5) 



(6) 



