BENZOIC ACID. 113 



zoic acid, Benzoate of soda or ammonia was 

 proposed by Hizinger as an excellent reagent 

 for separating iron from other bodies ; and I 

 find it to answer just as well as succinate of 

 soda. The method of proceeding with both 

 salts is precisely the same. 



3. Benzoic acid, like acetic and succinic acids, 

 combines with protoxide of lead in two propor- zoic acid - 

 tions, forming a salt composed of 1 atom acid 

 and 1 atom protoxide, and another composed of 

 1 atom acid and 3 atoms protoxide. Berzelius 

 found that when a mixture of benzoate of lead 

 and chlorate of potash was burned in the way 

 formerly described in glass tubes, a portion of 

 the acid was apt to sublime without decomposi- 

 tion. This did not happen so readily when the 

 sub-benzoate of lead was employed. The analy- 

 sis of a quantity of sub-benzoate containing O317 

 of benzoic acid gave O1414 water, equivalent to 

 0-01571 hydrogen ; and 0-8645 carbonic acid, 

 equivalent to 0-23577 carbon. Consequently, 

 the constituents of benzoic acid are 



Hydrogen 0-01571 or 0-75 

 Carbon 0-23577 - 1M5 



Oxygqn 0-06552 - 3-10 



0-31700 15-00* 



The second column, which exhibits the propor- 



Anr.als of Philosophy, V. 181. 



