554 Bulletin 167 



Measurements upon preparations from 24 hour agar slants 

 stained two minutes with carbol fuchsin without heating yielded 

 the following results. 



Fliigge (6:292) states that B. fluorcscens liquefaciens i^ 



.3-. 5 microns in diameter and 1-2 microns in length. According 

 to Mig'ula (21 :886) Ps. fluorcscens has the following dimen- 

 sions : diameter .68 microns; length 1.17-1.86 microns: Chester 

 (3:323) gives the following: 1-1.5 microns in length by .5 

 microns in diameter. Ellis (5:108) gives the length of the rods 

 from 1.5-6 microns and the diameter .4 microns. Zimmermann 

 (34:16) gives the following measurements for B. fluorcscens 

 tenuis. Length 1-1.85 microns; thickness approximately .8 

 microns. 



2. Endospores. — Xo indication of endospores was ob- 

 served in any strain. The various spore stains which were 

 tried failed to show anything further than polar bodies or 

 granulation of rods. Zimmermann notes the presence of polar 

 granules in B. fluorcscens tenuis (34:16). 



3. Flagclla. — Flagella preparations were made only upon 

 the sap bacteria. From 1 to 6 polar flagella were easily dem- 

 onstrated upon each strain except CXV. (See Plate X. figures 

 5 and 6). Preparations were made from 16 to 24 hour agar 



