142 The Ohio Journal of Science [Vol. XXI, No. 5, 



Station 11. This was established to replace number 1, 

 which it slightly overlapped along the shoreline. Since most of 

 number 1 was shore, this was out farther, with bottom more 

 muddy and of more pronounced slope. 



Station 17. In a slight depression in the fiat shore area 

 (former station 1) an accumulation of water late in summer 

 necessitated this new station. The bottom of this little pool 

 was even, sandy and gravelly, and its depth three or four inches. 

 The surface was free from duckweed, even though so close to 

 the duckweed covered pond. 



Station 13. This was a spring on the north-east shore of 

 the small pond, enclosed by a cylindrical brick wall, and the 

 top partly covered by a board. It was close to three feet deep, 

 and the water level as high as in the pond, which came prac- 

 tically up to the rim of the spring. After the lowering of the 

 water level, there were several feet between the new pond 

 edge and the spring, in which the water level was lowered 

 almost as much as in the pond. A little water trickled down 

 from it to the pond. 



Station 2. This was located in the northwest corner of the 

 small pond. Its sides were both shores of the small indenta- 

 tion that was nearest the large pond. The shoreline was relatively 

 steep and the water deeper than along the northeast and east 

 shores of this pond. 



Station 12. The same change referred to above altered 

 number 2 in several ways. The channel dug to connect the two 

 ponds changed the former, little, secluded, duckweed covered 

 bay to an open area, narrowed by the lowering of the water 

 level and having a slightly perceptible current through it at 

 times, towards the large pond. But frequent winds, blowing 

 eastward over the large pond, moved leaves and debris up to 

 this channel opening and practically prevented migration of 

 duckweed from the small pond. 



Station 3. This was located off the southwest shore of the 

 small pond. The shore was less steep and solid than other 

 shores except the entire south-east end. The bottom sloped 

 down rapidly and was soft and muddy. 



The narrow southeast end of the small pond was low and 

 marshy in its shoreline, the water very shallow and the bottom 

 very mucky and muddy. It was almost choked with fallen 



