189I.] NEW-YORK MICROSCOPICAL SOCIETY. 107 



Mr. George F. Kunz donated to the Library of the Society 

 Special Report No. 8 of the U. S. Department of Agriculture, 

 entitled "Cotton in the Empire of Brazil (1885) : by John C. 

 Branner, Ph.D." 



Meeting of February 2oth, 1891. 



The President, Mr. P. H. Dudley, in the chair. 



Twenty-seven persons present. 



Mr. H. W. Calef was elected Recording Secretary /;-<? tern. 



The Corresponding Secretary presented a communication from 

 the New York Academy of Sciences requesting the appointment 

 of "two commissioners to meet with the same number from each 

 of the other scientific societies located in New York City, with a 

 view to holding a conference at which can be discussed plans for 

 mutual benefit." 



The Chair appointed as such commissioners Rev. J. L. Zabris- 

 kie and Mr. J. D. Hyatt. 



Dr. Charles E. Pellew addressed the Society on '* The Bacillus 

 of Tuberculosis " 



In a most able and interesting manner Dr. Pellew explained 

 the character and operation of tuberculosis, the nature, operation, 

 and culture of various bacilli, and gave a biographical sketch of 

 Dr. Koch, with especial reference to his experimentation con- 

 nected with the discovery of the properties of " the lymph," and 

 the method of the employment of the latter in combating the dis- 

 ease. 



The address was illustrated by an admirable projection of 

 numerous lantern slides, by large colored diagrams, growth of 

 tacilli in culture tubes, a large preparation on glass of human 

 tuberculous mesentery, a bottle of the *' Koch lymph" just re- 

 ceived from Germany, and the following objects under micro- 

 scopes, exhibited under the supervision of Dr. Pellew's assistants, 

 Messrs. H. S. Stokes, H. C. A. Amory, and A. S. Vosburgh: 



OBJECTS EXHIBITED. 



1. Tubercle bacilli in sputum. 



2. Giant cell in tubercle of finger. 



3. Bacillus megaterium. 



