l894-] NEW-YORK MICROSCOPICAL SOCIETY. 25 



The President announced the death of Dr. Paul Hoffman, a 

 Resident Member of the Society, which event occurred on the 

 ist inst., and appointed the following committee to formulate 

 action of the Society : Dr. F. D. Skeel, Mr. J. D. Hyatt, and 

 Rev. J. L. Zabriskie. 



Mr. William E. Damon, of the Committee on Nominations of 

 Officers, reported for said committee, nominating the present 

 Officers of the Society for re-election to their respective offices 

 in 1894. 



OBJECTS EXHIBITED. 



1. A simple centrifuge for separating urinary sediment, dia- 

 toms, etc. : by H. G. Piffard. 



2. A Leitz loup, of excellent definition and unusually large 

 field, recently manufactured by Craft on Steinheil's plan : by 

 H. G. Piffard. 



3. Section of oolitic chert from Dutchess County, New York : 

 by J. D. Hyatt. 



4. Section of a variety of the same, from the same locality : 

 by J. D. Hyatt. 



5. Section of oolitic chert from Pennsylvania : by J. D, 

 Hyatt. 



6. Micrococci in canaliculi of human tooth : by Frank 

 Abbott, Jr. 



7. Spirillum in canajiculi of human tooth : by Frank Ab- 



'BOTT, Jr. 



8. Transverse and longitudinal sections of the seed of PJiy- 

 telephas macrocarpa Ruiz and Pavon, Ivory nut : by J. L. Zabris- 

 kie. 



9. Transverse section of the seed of Smilacina ra^emosaDesL, 

 False Solomon's Seal : by J. L. Zabriskie. 



10. The fungus y^cidium adoxce, on the leaf of Adoxa tnos- 

 chatellina : by Henry C. Bennett. 



11. Q,y(^\o€\s\'s\ Anacharis : by A. D. Balen. 



12. Circulation in Daphnia : by A. D. Balen. 



13. Helices of fine wire for supporting cover-glass prepara- 

 tions : by F. D. Skeel. 



Dr. Frank Abbott explained that the centrifuge exhibited 

 was manufactured by Ernest Leitz, of Wetzlar, Germany, and 

 he demonstrated its action by rotating the instrument for about 



