1893.] NEW-YORK MICROSCOPICAL SOCIETY. 77 



was illustrated by preparations exhibited, as noted below, and is 

 published in this number of the Journal, page 71. 



Dr. Edwards also donated to the Cabinet of the Society a 

 packet of the clay of Hatfield Swamp and a prepared slide of 

 diatoms from the same. Dr. Edwards further gave an account 

 of his experience with the use of Gum Thus, from Pinus tceda L., 

 as a mounting medium in place of Canada balsam. 



On motion the thanks of the Society were tendered Dr. Ed- 

 wards. 



OBJECTS EXHIBITED. 



1. Seven slides, containing 1,021 diatoms, prepared by E. 

 Thum, of Germany : by Henry C. Bennett. 



2. Holler's Probe Platte, 80 diatoms, arranged in lines with 

 names photographed beneath : by Charles S. Shultz, 



3. Diatoms from California : by Frank D. Skeel. 



4. Bacillaria paradoxa, living in aquarium since October, 1892 : 

 by Stephen Helm. 



5. Fossil diatoms from Manatee River, Florida, prepared by 

 K. M. Cunningham : by J. L. Zabriskie. 



6. Diatoms from Hatfield Swamp, N. J. 



7. " " Nutley, N. J. 



8. " " South Plainfield, N. J. 



9. " '* '^ Kettle Hole," near Plainfield, N. J. 



10. " '• Columbia Bridge, N. J. 



Exhibits Nos. 6-1 1, all mounted in Gum Thus, prepared and 

 exhibited by Dr. Arthur Mead Edwards. 



Meeting of March 30, 1893. 



The President, Mr. Charles S. Shultz, in the chair. 



Thirty-eight persons present. 



The Corresponding Secretary read a communication from Mr. 

 Charles S. Fellows, of Minneapolis, Minnesota, accompanying 

 the donation of a slide of Terpsinoe musica to the Cabinet of the 

 Society, and dated February 19th, 1893, as follows : 



"I noticed in the Journal a letter, read October 21st, 1892, 

 from Mr. Cunningham, regarding Terpsinoe musica Ehr. 



'' In 1883 I found this form in Florida. A spring took its rise 



