222 THE AMERICAN MONTHLY [July 



In making the acid h?ematin, I took 100 cc. of 95 per 

 cent alcohol and added 2cc. of sulphuric acid, and then 

 10 cc. of blood ; the mixture was boiled for about an 

 hour in a flask tube three or four feet long- so that the 

 vapor passing off would be condensed in upper part of 

 the tube and flow back into the flask. 



During this process a precipitate is formed which is 

 acid haeraatin. The solution is filtered and the precipi- 

 tate is dissolved in alcohol and then examined. Since 

 the precipitate is soluble in alcohol, that which is obtained 

 by filtering does not represent all the haematin, for a 

 part would be dissolved while boiling. The spectrum 

 has one broad band near C. Most of the remaining por- 

 tion of the spectrum is also absorbed. 



If 95 per cent alcohol be added to blood and a small 

 quantity of caustic soda, a still different spectrum is 

 obtained. This is the alkaline haematin spectrum. It is 

 similar to the acid haematin except the dark band is near 

 and often on D. 



Announcement of the Toledo Meeting of The American 

 Microscopical Society. 



By E. W. CLAYPOLE, 



AKRON, OHIO. 



The annual meeting will be held at Toledo, on August 

 5, 6, and 7. The Microscopical Society of that city have 

 taken up the matter very co'rdially and intend to do their 

 best to make the visit and the meeting both pleasant and 

 profitable. 



The members outside of Toledo are asked to do their 

 part to secure the success of the meeting by their pres- 

 ence if practicable, or, if not, by sending contributions to 

 be read. Short notes on methods of work, notices of 

 observations, details of experiments are all of value and 

 will be welcome. 



