l886.] NEW-YORK MICROSCOPICAL SOCIETY. 49 



creased in number, but decreased, I think, in size. The bottle 

 has hung constantly in front of a window where the sun shone 

 in during a part of the day." 



MEETING OF FEBRUARY I9TH, 1886. 



The President, Mr. J. L. Zabriskie, in the chair. 



Twenty-seven persons present. 



The following objects were exhibited : — 



1. Crystals of Vanadinite : by M. M. Le Brun. 



2. Young Poduras, found on gills of Toad-Stool : by W. G. 

 De Witt. 



3. Fresh Crystals of Platino-Cyanide of Magnesium : by C. 

 Van Brunt. 



4. Seeds of Anagallis arvensis, in situ in pyxis : by B. 

 Braman. 



5. Ribes nigrum ; transverse section of stem, double stained : 

 by Walter H. Mead. 



Mr. P. H. Dudley exhibited a Thoma Microtome, and de- 

 scribed the method of using the same. 



Mr. H. L. Brevoort exhibited a compound microscope and 

 accessories made by Dolland, of London, which had been in the 

 possession of Mr. Brevoort's family since 1795. 



The President exhibited a smaller microscope of simpler con- 

 struction, also by Dolland, and as old as that shown by Mr. 

 Brevoort. 



Mr. W. G. De Witt said that the scales shown by him were 

 from a young podura. They were found, he said, near Savan- 

 nah, Georgia, on the gills of a toad-stool, in the month of ApriU 

 He suggested that search for poduras be made in this vicinity 

 during the months of May and June, which, in this latitude, 

 correspond in temperature with April in Savannah. 



Mr. Arthur G. Leonard was elected an active member. 



