881 



Aiul if lliis facloi- 7 was re;illv eqiiallv i^roat for all snlislaiicGs, 



'/'/,■ 



— would be aliiiosi i)i'üi)orli()iial (o the si/e ol' llie molecules. As 



pk 



it is not my purpose in Ihis communication to calculate the exact 



numerical value of the size of the molecules, and in connection 



with this the perfectly exact numerical value of the component atom 



volumes, which perhaps is not yet feasible, amon{[^ others on account 



of the imperfect knowledge of the accurate value of 7/. and />/., and 



as this communication more bears the character of a i)reliminary 



exploration of the territory, I shall assume the (iuantitj ' as a 



Pk 

 numerical value, which is really, at least by approximation, pro- 

 portional to the size of the molecules and by the aid of this value 

 I will investigate what follows for the size of the component atoms 

 from this size of the molecules. The quantities 7\- and />/: ai'e borrowed 

 from the excellent Recneil des Constantes physiques by Messrs. 

 Abraham and Sacerdote. 



As I expected the simplest relations for the saturated hydrocarbons, 



For the increase of the molecular volume in consecpience of the 

 introduction of 1 atom C. and 2 atoms H into tl;e molecule CH^, 

 we successively find the values: 



2,7626 



2,37 



2,668 



2,7134 



2,753 



2,802 

 and with Decane — Ethane 2,781. 



