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means of attracting attention to the facilities which the Univer- 
sity offers for instruction in the sciences, since students availing 
themselves of the opportunities of the Summer School are apt 
to be drawn to the University for further work. 
Although the number in attendance was not so large as had 
been expected, still certain features of the enterprise are 
encouraging. Among these is the cordial response of the 
citizens of Havana to those needs of the School which can be 
supplied onty by local support. There was no difficulty in 
securing pleasant and comfortable accommodations for all in 
attendance ; anda much larger number would not have exhausted 
the facilities offered. From its beginning the Station has 
received generous treatment at the hands of the business men 
of the town. Indeed, the granting of a site for a Station build- 
ing upon the public river front on the bluff overlooking the river 
has been urged in the local press. A second encouraging 
feature is the satisfaction expressed by those in attendance 
with the work they have been able to accomplish in Havana, 
and the frequently repeated desire to continue it when oppor- 
tunity offers. 
Very respectfully yours, 
C. A. Koromp, 
Superintendent of Biological Station. 
REPORT ON WATER ANALYSES. 
To the Director of the Laboratory. 
Str: During the two years just passed the number of 
water samples, from the streams and lakes in the vicinity of 
Havana, Illinois, which were examined by the State Water Sur- 
vey as conducted by the department of Chemistry of the Uni- 
versity, were as follows: Illinois River and Spoon River 102 
samples from each, these being regular weekly collections from 
each of these sources. The collections from Quiver Lake number, 
all told, 28, and a like number has been taken from Thomp- 
son’s Lake. The waters from these different sources have been 
subjected to the regular sanitary analysis and there has been in 
the different seasons of the year considerable variation in the 
quantities of organic matters contained, but it is to be noted that 
