69 



cation of six bulletins, and it may be safely said that there is 

 no equal part of the state as well known, so far as the work 

 has been published. 



It is believed that the entire state should be surveyed in a simi- 

 lar manner. Should the State Academy seriously consider a 

 biological survey, the relation of the Natural History Survey of 

 the Chicago Academy of Sciences to this survey would be that 

 of general supervision of the work in northeastern Illinois. It 

 would seem that the various institutions scattered over the state 

 should have general charge of the work in their immediate vi- 

 cinity, which would later be co-ordinated by the State Academy. 

 The State Academy might also, with great benefit to the scien- 

 tific workers of the state, act as a central bureau of information, 

 providing itiforniation relative to the most reliable sources for 

 help on any given topic, and the Chicago Academy of Sciences 

 would naturally offer aid in the departments of Mollusca and 

 ornithology. By this means the State Academy would become 

 the recognized center around which the scientific activities of 

 the various workers would crystallize. 



In conclusion the speaker wishes to place before the State 

 Academy for its consideration the subject of a biological sur- 

 vey of a size and nature commensurate with the extent and im- 

 portance of the great state of Illinois. 



FARM W^\TER SUPPLY. 



EJDVVARD Bartow. 



Of the well waters sent to the State Water Survey during 

 1907, 60 per cent were condemned. Of the waters from wells 

 less than twenty-five feet deep, 85 per cent, were condemned. 

 Well water is usually sent to the Water Survey because of sus- 



