ISO COMBUSTIBLE ACIDS. 



ed on a double filter, and being washed and 

 dried in a temperature not quite so high as 212, 

 weighed as nearly as possible 18*5 grains. Now, 

 4*5 of this weight were oxalic acid; consequent- 

 ly, the protoxide of lead in 23*625 grains of ace- 

 tate of lead is precisely 14 grains.' The portion 

 of the salt wanting to make up the total weight 

 of 23-625, is obviously acetic acid. Thus it ap- 

 pears, from the preceding analysis, that acetate 

 of lead is composed of 



Acetic acid 

 Protoxide of lead 

 Water 



23-625 



The salt being neutral, and 14 being equivalent 

 to the weight of an atom of protoxide of lead, 

 and 3*375 to that of 3 atoms of water, it is ob- 

 vious that 6-25 must represent the atomic weight 

 of acetic acid. 



Acetate of 3. I made some experiments upon the acetate 

 of lime; but found that it cannot be rendered 

 anhydrous without exposing it to a temperature 

 so high that the acid is partially driven off or de- 

 composed. At the temperature of 450, the salt 

 retains about the third of an atom of water. 

 Berzelius kept the salt for some time in the 

 highest temperature which it could bear : it ap- 

 pears from the result of his analysis, that when 



