VARIETIES OF COLON BACILLI 



193 



mannite nor raffinose); and he indicates reactions in 

 other media by subscript letters. These types with 

 their subtypes are fully discussed in the last report 

 of the Committee on Standard Methods of Water 

 Analysis (191 2). 



Clemesha's Investigation of Stored Waters in India. 

 The most suggestive contribution to this subject which 

 has been made in recent years is a book by Major W. 

 W. Clemesha of the Indian Medical Service on The 

 Bacteriology of Surface Waters in the Tropics (Clemesha, 

 1912^), in which a vigorous argument is made for the 

 MacConkey classification in practical water work. 

 Major Clemesha's researches show the prevalence 

 of considerable numbers of all of ]MacConkey's primary 

 types in human and bovine faeces as indicated in the 

 table below, although the relative proportions found 

 in England and in India do not correspond very closely. 

 Clemesha's percentages are of special importance 

 because they are based in each case on over 1000 

 colonies. 



RELATIVE PROPORTION OF MacCONKEY'S GROUPS IN 

 HUMAN F^CES AND IN COW DUNG 



Both in human fasces and in cow dung Clemesha 

 finds the prevailing types to be B. coh, B. Griinthal, 



