449 



fojiceutralion of I lie ketone, the values under it representing the 

 oxygen absorption, expressed in cc. per liour. Tiiej' are the mean 

 of a great many ninlnally concordant observations. 



1. Benzophenon. 



2. Phenylcyclohexylketone. 



3. Dicyclohexyiketone. Inactive in all concentrations. 



4. Phenyl n. hexylketone. 

 5 Di-n hexylketone. Inactive in all concentrations. 



6. Acetophenori. 



7. Propiophenon. 



8 Phenylbenzylketone. 



9 Diphenylacetophenon. 



10. Triphenylacetophenon (5-benzpinacoline). Inactive. 



11 Acetone. Inactive in all concentrations. 



12. Monophenylacetone. 



