7() 



The only facts which militate against the validity of the limit assigned 

 are that a survey of the two strata up and down the river for several miles 

 shows them to be conformable ; but as stated above, in Ripley county the 

 fifty feet of non-fossiliferous rock is absent, proving non-conformability, 

 and that the fossils, with few exceptions, are unlike others found in the 

 Hudson river group. 



The Kankakke kiveh and pure water for Northwestern Indiana axd 

 Chicago — By J. L. Campbell. 



The Kankakee river is the unsolved engineering problem of Indiana. 



How to secure the proper drainage of the vast basin known as the Kan- 

 kakee marshes is a question which has not had a practical answer— chiefly 

 on account of the expense necessary to carry out any of the proposed plans. 

 A new interest in this question may be developed in connection with the 

 problem of an adequate supply of pure water for the new cities in north- 

 western Indiana and of Chicago, beyond our borders. 



The fact exists, although vigorously denied by citizens of Chicago, that 

 pure water has not been obtained by the tunnel system into Lake Michigan, 

 and it is more than probable that further extension of the system will fail 

 to furnish pure water, and after the most costly experiments or repeated 

 disappointments the city will seek its water supply from other sources. 



The effort to keep the lake water pure by artificial drainage of the city 

 into the Illinois river may be partially successful — but even this is doubt- 

 ful — and at best changes will be enormously expensive, — literally an up-hill 

 business. 



It will not be denied that a vast territory around Chicago cannot be in- 

 cluded in the artificial drainage system, and this territory will continue to 

 be drained into Lake Michigan. 



The mouth of the tunnel, whether located two or ten miles from the 

 shore, is the source of an artificial stream toward which currents must tend 

 from all directions. Into these currents the impure drainage of the city 

 will be carried, and the water supply will be contaminated. 



The extension of the tunnels doubtless will furnish less impure water, 

 but certainly not the pure supply necessary for the health of a great city. 



The practical (luestions connected with the question of the water supply 

 of a great city are : — 



