M i» ri i organ isms i ii? .\' Ai'i.r. Sap 



553 



ployed were those recommended in "Standard Methods of Water 



\u;il\ sis." 



Detailed Features 



I. Morphology 



i. Vegetative cells. — Observations were made on 24 hour 

 agar hanging block cultures and on hanging drop preparations 

 from 16 to 24 hour agar slant condensation water. The cells 

 ot all strains were motile rods of medium length with rounded 

 ends, occurring typically in chains of two; less frequently singly, 

 or in chains of four or eight. Measurements were made of 

 what appeared to be individual cells, but in some cases the 

 figures given may represent double organisms. The limits of 

 size which were obtained are best shown in tabular form : 



TABLE 59. LIMITS OF SIZE ON HANGING BLOCK 



TABLE 60. LIMITS OF SIZE ON HANGING DROPS 



