BACTERIOLOGICAL TECHNIC. 8 1 



TABLE I. 



A Numerical System of Recording the SalIent Characters of an Organism 



(Group Number). 



loo Endospores produced. 



200 Endospores not produced. 



10 Aerobic (Strict). 



20 Facultative anaerobic. 



30 Anaerobic (Strict). 



I Gelatin liquefied. 



2 Gelatin not liquefied. 



o . I Acid and gas from dextrose. 



0.2 Acid without gas from dextrose. 



0.3 No acid from dextrose. 



0.4 No growth with dextrose. 



.01 Acid and gas from lactose. 



.02 Acid without gas from lactose. 



.03 No acid from lactose. 



.04 No growth with lactose. 



.001 Acid and gas from saccharose. 



.002 Acid without gas from saccharose. 



. 003 No acid from saccharose. 



.004. No growths with saccharose. 



.0001 Nitrates reduced with evolution of gas. 



.0002 Nitrates not reduced. 



.0003 Nitrates reduced without gas formation. 



. ooooi Fluorescent. 



.00002. Violet chromogens. 



.00003 Blue chromogens. 



. 00004 Green chromogens. 



. 00005 Yellow chromogens. 



.00006 Orange chromogens. 



. . 00007 Red chromogens. 



.00008 Brown chromogens. 



.00009 Pink chromogens. 



.00000 Non-chromogenic. 



.000001 Distasic action on potato starch, strong. 



.000002 Distasic action on potato starch, feeble. 



.000003 Distasic action on potato starch, absent. 



.0000001 Acid and gas from glycerin. 



. 0000002 Acid without gas from glycerin. 



. 0000003 No acid from glycerin. 



.0000004 No growth with glycerin. 



The genus according to the system of Migula is given its proper symbol which precedes 



the number thus: (7) 



Bacillus coli (Esch.) Mig. becomes B. 222.111102 



Bacillus ALCALiGENES Petr. becomes B. 212.333102 



PsEUDOMONAS CAMPESTEis (Pam.) Sm. be- 

 comes. Ps- 2"-333iSi 



Bacterium suicida Mig. becomes Bact. 222.232103 



6 



