Combination qf Sulphuric Acid and Water, 263 



and the difference between the multiple and the number of 

 atoms is the amount of the difference. 



Let us multiply the atomic weights and specific heats of 

 the compounds of oil of vitriol and water, in order to see 

 whether this law will apply to them. 



Water, . . 



1 acid + 1 water 



+ 



+ 

 + 

 + 



+ 



+ 10 



:0-375 

 :0-375 

 :0-375 

 :0-375 

 :0-375 

 :0-375 

 =0375 

 :0-375 

 :0-375 

 :0-375 

 :0-375 



x3 



x5-87 

 x9 09 

 X 10-68 

 X 13-24 

 X 16 12 

 X 19-08 

 X 22-07 

 X 25-01 

 X 28-24 

 X 31-20 



The last column of the table shows to what number 

 multiplied into 0-375, the product of the atomic weight by 

 the specific heat, is equal. A slight examination of that 

 column is sufficient to show that the respective multiples 

 approximate to the following numbers. 



Multiples. 



Or there is a regular increment by 3, except in the case 

 of (1 atom acid + 3) and (1 atom acid -f 4 water), when the 

 increments are only 2. 



If we admit that these numbers multiplied by 0*375 give 

 the true products of the atomic weight into the specific 



