590 



I'.n.i.KTTX 167 



GROUP NUMBEE OF T1IK 13 STRAINS 



The group number of the 13 strains was easily computed 

 with the exception of the digits representing the action of the 

 bacteria upon carbohydrates and glycerin. On account of the 

 formation in the control, i. e., peptone solution, of decomposition 

 products having an acid reaction, there is some doubt in certain 

 cases whether the acid in the sugar and glycerin peptone media 

 resulted from oxidation of the introduced compounds, or from 

 proteid decomposition. In each case the amount of acid pro- 

 duced in the carbohydrate media was compared with the amount, 

 if any, produced in the control, and where the difference was 

 less than 0.2% the digit representing no acid production was 

 recorded. However a comparison of the tables will show that 

 no sharp line of differentiation exists between acid production 

 and no acid production. 



The group numbers determined were as follows: 



Ps. alba, 

 Ps. longa, 

 Ps. putrida, 



Ps. mesenterica, 

 Ps. LI, 

 Ps. tenuis, 

 Ps. CXL, 



Ps. fluoreseens, 

 Ps. CXII, 

 Ps. CXLV, 

 Ps. CXLVIII, 

 Ps. XXXVI, 



B. CXV, 



212.2332133 

 212.3332133 

 212.3332132 



91 1 9000-100 

 Z ± J. . i- o o o 1 o o 



211.2233133 

 211.2322133 

 211.2222133 



211.2223132 

 211.2222133 

 211.2332133 

 211.2222132 

 211,2223132 



211.3332?33 Doubtfully fluorescent 



Non-1 iquetiers 



Tardy liquefiers 



Rapid liquefiers 



species 



As already noted bacteriological literature contains descrip- 

 tions of over 50 species of bacteria which are capable of pro- 

 ducing green fluorescence upon the common media. However. 

 it is probable that many so-called species are identical with. 

 or varieties of, previously named species. The following refer- 

 ences from literature are cited as illustrations of the trend of 

 i ipinion. 



