42.? 



Ö°55'. The conospondirig curve generalij deviates only a little from 

 a straight line; however we fonnd that this deviation is jet sufficient, 

 to make a correction necessarj for all numl)ers, calculated from 

 Cantor's formula. 



§ 5. From a special case we can now see easilj, that the cal- 

 culation of the results in this waj and from Cantor's formula, will 

 never cause an appreciable change in the general shape of the (/-t- 



curves, and therefore neitJier in the deduced values of -'-• the deviaf- 



dt 



ion of a linear relation between /; and q is between <9=70'3r43" 

 and 90° onlj so slight, Hiat a somewhat impoitant deformation of 

 the mentioned curves caiuiot be the result of this difference in com- 

 putation. However there will be caused a parallellous shift of every 

 curve, which will diminish the absolute values of x and ft ivith a 

 small amount. That this influence is not at all without importance 

 in the cases hitherto investigated, niaj be jiroved in the following 

 waj. We choose for this purpose tw^o extreme cases of the here 

 studied liquids: diethylether, because the observed values of /Tare 

 here the smallest, and e.g. a substance as resorcine-monomethijlether, 

 whose values for H belong to the rather great ones. The calculation 

 is made as follows: H 'm m.m. of mercury (0 C.) is multiplied bj 

 the specific weight of mercurj, and this number divided bj the 

 product r.d,, {r Lieing expressed in mm.). With the obtained value 

 for p, the corresponding value of q is found from the table or the 

 diagram; this divided bj 2 and nudtiplied by the product r'' . d, , 

 gives X in "itl. pro m.m; the number is reduced to Erg pro cm', 

 bj multiplication with 9,806. 



Diethylether. 



X in Erg. x i" Erg. ft in Erg. ft in Er; 



f 



-75° 

 -20°,5 

 0° 



11° 



25° 



29°,6 



p q 



37,53 36,92 



30.60 29,89 

 28,28 27,58 

 26,93 26,27 



25.61 25,00 

 25,35 24,70 



cm.-- 

 28,5 

 21,5 

 19,2 

 17,9 

 16,7 

 16,4 



cm.-- (Cantor) 

 28,9 

 21,9 

 19,6 

 18,4 

 17, J 

 16,8 



cm.~'^ 

 574,7 

 456,2 

 415,8 

 392,0 

 371,2 

 365,9 



cm. -'^(Cantor) 

 582,8 

 464,7 

 424,5 

 402,9 

 380,0 

 374,8 



The whole /-/-curve is thus parallellouslv shifted to an amount 

 of —0,4 Erg. 



28* 



