Date of Award

Spring 1949

Document Type



Life & Environmental Sciences

First Advisor

Cal Bifoss

Second Advisor

Rev. Patrick Murray


Recently, the natural filtration effects of the soil upon some intestinal bacteria have not been studied from the viewpoint of determining their number and kind present as a result of external environmental influence.

In an endeavor to answer such a question, the terms of the thesis will be limited to the "biological action of the soil upon water that filters through the soil into the earth". (1)

Therefore, work presented here will be confined to the growth, study and count of some intestinal bacteria upon standard dehydrated media, with special emphasis placed upon the increase or decrease of their number and kind over an established distance and depth.