56 



Proceedings of Indiana Academy of Science 



riAP or 

 INDIANA 



FIk. 1. Death rate from typhoid, the av- 

 erage of the four years 1917-1920. Data 

 from State Board of Health reports. 



Fi}^. 4. Value of farm land per acre, ac- 

 coi'dinK to counties. 



Fig. 2. Section shaded indicating the area 



where limestone outcrops extensively and 



where the water supplies come from lime- 

 stone. 



Fig. 3. Section shaded to 

 important coal mining area. 



indicate the 



