375 



A List of Alg,e. 



(Chiefly from Monroe County, Indiana.) 



By F. M. Andrews. 



The list of Algae given at the end of this paper includes about one 

 hundred and seventy-five forms, most of which are from Monroe County, 

 Indiana. Some few species of these Algae are from the Eagle Lake and 

 Turkey Lake in the northern part of Indiana, while a few others have been 

 obtained from other sources. The collection of these forms has extended 

 over a period of several years, for a continuous effort to obtain the forms 

 here mentioned was not made except in the case of the Algae found in the 

 water works of this city in 1896. At this time some of the forms of Al- 

 gae then to be found in the city water works of Bloomington were collected 

 by Dr. George J. Peirce, now of the Leland Stanford Junior University, 

 Mr. A. C. Life, and myself. A title of the work done by us conjointly ap- 

 peared in the proceedings of the Indiana Academy of Science for 1896, on 

 page 208, entitled : "A Microscopic Examination of Certain Drinking 

 Waters." 



In this work not only the forms at the surface and edges of the reser- 

 voir were obtained, but also those to be found at different depths in the 

 water. On account of the lack of more elaborate instruments and means 

 for doing this, we hit upon a very simple but sufficiently effective plan. 

 This was done by securing a bottle of the proper size and shape, fitted with 

 a stopper, to a heavy cord. The stopper also was attached to a cord. 

 After rowing out into the reservoir, the water of which varied from fifteen 

 to thirty feet in depth, this weighted bottle was lowered to the desired 

 depth by one string and the stopper partly removed by the other string. 

 After the bottle had filled with water, as could be told by the rising of 

 bubbles, the stopper was allowed to slide back in place, thus reclosing the 

 bottle. To prevent the stopper from being pulled out of the bottle 

 and thus rendering it impossible to replace it before raising the bottle 

 from the water, a string of the proper length was tied around the neck of 

 the bottle and to the stopper. To be sure that the glass stopper would 

 settle back into the bottle after filling, I found a band of rubber fastened 

 around the neck of the bottle and the stopper to be effective in accomplish- 



