506 



Transactions. — Chemistry and Physics. 



With the exception of lead-bromide and sodium-nitrate, the 

 numbers varv from 1-9 to 2-2, with the value 2-07 as mean. 



B. Organic Compounds. 



With the exceptions of acetoxime and phenanthrene, the 

 numbers vary from 2-35 to 29. The mean value 2-57 is 

 distinctly greater than the value obtained for the inorganic 

 compounds. Whether this difference is due to the large 

 number of atoms in the compounds of carbon or whether it is 

 one of those peculiar properties of this element remains to be 

 seen. The value of the constant is about twice as great as 

 that obtained for the elements themselves. 



I have neglected to compare Crompton's 1895 relation 

 Mw/TEV with the others, because until chemists can agree 

 as to what is really meant by the sum of the valencies (EV) 

 in a compound the results thus obtained will be of no value. 

 In the last column of Table IV. is placed his second relation- 

 ship, 10 x wd/T. Regarding this, he says that when the 

 result is about unity the liquids are non-associated, and when 

 greater the liquid is proportionately associated. It may be 

 remarked that about 25 per cent, of the values are consider- 

 ably " below " unity. 



* Specific gravity in the tolid state determined by the author. 



