RESEARCHES ON THE 



11V 



7^ 



Formula. (?) 



C I2 H 14 



^14 "16 



Qo His 



Formula 



C20 H* 



24 



24 



2d Series.* 



Determined 

 Boiling-point 



Calculated Bniling- 



point by Schrbdtrl 



theory. 



8-9 

 37.0 



68.5 



98.1 

 127.6 



O 







20 

 40 

 60 

 80 



Difference In-tween 



Calculated and Deter 



mined Boiling-point. 



8-, 

 17.0 



38.1 

 17.6 



3d Series. {Not completed.) 



Determined 

 Boiling-point 



Calculated Boiling- 

 point by Schroder's 

 theory. 



174.9 



1 V5.H 



216.2 





130 

 150 



170 



Difference between 

 I tlculated and Deter 

 mined Boiling-poin 



44.9 



45.8 



1 6.2 



Name of Substance. 



Benzole, 

 Toluole, 

 Xylol e, 

 Isocumole, 



2. Hydrocarbons from Coal-tar Naphtha. 



Formula. 



C M H 8 



Cw H I2 



Determined 

 Boiling-point 



80.0 



110.3 

 139.8 

 169.9 



Calculate*! Boiling- 

 point by Schroder's 

 theory. 



o 



80 

 100 

 120 

 140 



DiflVnjHv between 



Calculated ami D< ter 

 mined Boiling- point. 



o 



0.0 

 10.3 



19.8 

 29.8 



3. The Homologous Hydrocarbons from Oil of Cumin and Cuminic Acid. 



Name of Substance, 



Cumole, 

 Cymole, 



Formula. 



Determined 

 Boiling-point. 



Calculated Boiling- 

 point by Schroder 

 theory. 



Difference between 

 Calculated and Deter- 

 mined Boiling-point. 



Cj8 "12 



Q» Hi 4 



151.1 

 179.6 



o 



160 



O 



11.1 

 19.6 



It appears, therefore, that the theory of Schroder finds no support from any one oi 

 the different series of hydrocarbons presented in these tables. The discrepancy be- 

 tween the observed and calculated boiling-points, as shown, varies from about 10° to 



50° C 



from 



This discrepancy is found to increase pretty uniformly by about 10° as we rise 

 one member to the next higher in the ascending series. In the series of the 



about 4G 



I 



formula C n H n , however, the discrepancy is nearly a constant one, viz. 

 would not overlook the fact, that the calculated boiling-point of benzole is absolutely 

 identical with that found by experiment ; nor the remarkable coincidence, that the 

 agreement is almost perfect between the probable boiling-point, and that obtained by 



* See foot-note on page 167. 



