PROCEEDINGS 



OF THE 



BIOLOGICAL DEPARTMENT 



OF THE 



ACADEMY OF NATURAL SCIENCES 



OF PHILADELPHIA. 



1860. 

 Reported by Walter F. Atlee, Recorder 



Dr. Joseph Leidy, Director 



January. 

 -Pathology. 



Dr. J. J. Woodward read a paper entitled, " Remarks on Errors in 

 Anatomical Diagnosis of Cancer."* 



II. Chemistry and Toxicology. 



1. Dr. Mitchell stated that lately in examining, in conjunction with 

 Dr. Hammond, the chemistry of corroval and vao, they had succeeded in 

 obtaining, in a crystalline form, corrovaline. It is formed by evaporation, 

 from the solution in chloroform ; one grain of corrovaline thus prepared 

 was dissolved in one hundred grains of water, and one drop from the 

 solution was sufficient to kill a mouse. The same quantity, in ten minute?, 

 killed a frog. 



2. Mr. Powel stated that when very young, in the laboratory of hi? 

 uncle, Dr. Robert Hare, he had witnessed some very extraordinary 

 poisonous qualities exhibited by the residue of the sweet oil of wine, dis- 

 tilled with some turpentine. The smell of this was sufficient to produce 

 dizziness aud lethargic symptoms. 



*See American Journal of the Medical Sciences, for April, 1860 



1 



