110 Biography of Berzelius. 
Inorganic Chemistry, Mineralogy, Vegetable and Animal Chem- 
istry, and Geology. 
He was also led to make experiments himself by these reports ; 
aud he then gave their results, when they contradicted, improved, 
or extended those of others, in the reports. 
ments against the hypothesis that all organic acids are hydrogen 
acids, and against the substitution theory. These arguments 
ve always a rare clearness and simplicity. 
The objection has often been made to this report, that it was 
sometimes very complete, and in some instances too extended ; 
ee en ea ee ae 
