106 



Drainage. — Drainage is also responsible in a great measure for the 

 lower water level. The miles of tile and open ditches, city storm sewers, 

 etc., carry a great part of the water to the streams as soon as it falls. 

 The water is thus carried away instead of hein;,' held to feed the wells, 

 springs, etc. Two instances have been given me in which wells went dry 

 after sloughs, lower than but near the well, had been drained. 



Greater Aiitoidits Iscil. — A growing population has increased the 

 drain uj)on the underground water supply. Water is jtut to more uses than 

 formerly and this, no doubt, has its effect upon the water level. 



IJELAT.YE IMPORTANCE OF ABOVE FACTORS. 



It was hoped that it would Ite possible to separate the effects of de- 

 forestation and drainage and determine just the part each had played, 

 but this can not be done in Montgomery County. My own judgment, based 

 on field work and reported data, is that drainage has played as great a 

 part in the lowering of the water level as has deforestation. 



The results of this study are not as detinite as were at tirst exiiected, 

 Init it is believed that the rather thorough study of such a typical county 

 in Indiana is well worth recording, and it is hoped that it may induce 

 others to undertake similar surveys in various parts of the Stixte until 

 more definite data are discovered upon which to base conclusions that, as 

 far as Indiana is concerned, will be sufficiently reliable for real scientific 

 work on the problem which depends upon these things. 



This investigation was carried on in the Botanical Laboratory of Wa- 

 bash College under the direction of I'rof. M. B. Thomas. 



15II5LI00RAPHY. 



The following bibliograjihy. while not complete, is sufliciently compre- 

 hensive to cover fairly the ixiints pi'csented. 



(1) Abbe, Cleveland. Determination of the True Amount of Precipita- 

 tion and its bearing on theories of forest Influences. Forest Service, 

 U. S. Dept. of Ag.. Bull. No. 7, pp. IT.'.-ISO. 



(2) Barbour, Erwin llinckly. AVells and AViiuhnills in Nebraska. U. S. 

 Geo. Sur., Dept. of Int. W.-S. and Irr. I'apcr No. 20. 



(3) Blauford. Nature NXX'IX, i). r,s:\. 



(4) BufTaiilt. I.a cap'" 'Ic rctcniionelle de la foret. Revue des eaux et 

 forets. January, lt)01>, pp. 1-ls, .'{;;-;m. April, IIKV.). j.p. 229-234. Re- 

 viewed in .\nierican Forestry, IMarcli, T.tld, ]ip. l."(<;-17."!. and Forestrj' 

 Quarterly, Vol. 7, pp. 322-321, Scplcmbci-. HMH». 



