THE AMERICAN 



MONTHLY 



MICROSCOPICAL JOURNAL. 



Vol. XVI. FEBRUARY, 1895. No. 2. 



Improved Methods of Collecting Aquatic Micro-Organisms. 



By R. H. ward, M. D. 

 TROY, N. Y. 



[Remarks at the Microscopical Section of the Troy Scientific Association, 

 Decembers, 1894.] 



During a visit last summer to the laboratory of the 

 Michigan State Fish Commission, at Charlevoix in that 

 State, I became greatly interested in the investigations 

 there made as to the food fishes, and other subjects and 

 interests more or less directly connected with their abun- 

 dance, preservation, etc. After the close of the labora- 

 tory, I gladly availed myself of the suggestion of its Di- 

 rector, my son Prof. Henry B. Ward, to make collec- 

 tions from the inland lakes and their tributary streams, 

 to the northward from that point, as a supplement to, 

 and for comparison with, the work in Pine Lake and the 

 neighboring portions of Lake Michigan, that had been 

 done directly from the laboratory. To this end, I vis- 

 ited Bear Lake, a most picturesque sheet of green water 

 and river-like aspect, south of Petoskey ; Carp Lake, a 

 delightfully quiet outing resort south of Mackinaw City; 

 and the devious succession of connected lakes (Crooked, 

 Burt and Mullet) and rivers (Crooked, Indian and Che- 

 boygan) which extend from Conway, close to Lake Mich- 

 igan, to Cheboygan on Lake Huron, and which make the 

 whole district northward to the StraitvS of Mackinac al- 

 most an island. The rivers, however, are but little 

 brooks, and the crossings of them are so insignificant 



