APPENDIX. 43 1 



The titration should be done after boiling to drive off any COj pres- 

 ent in the culture. 



(7) Generic nomenclature shall begin with the year 1872 (Cohn's 

 first important paper). 



Species nomenclature shall begin with the year 1880 (Koch's 

 discovery of the poured plate method for the separation of organisms). 



(8) Chromogensis shall be recorded in standard color term. 



TABLE I. 



A NUMERICAL SYSTEM OF RECORDING THE SALIENT CHAR- 

 ACTERS OF AN ORGANISM (GROUP NUMBER) . 



100. Endospores produced 



200. Endospores not produced 



10. Aerobic (Strict) 



20. Facultative anaerobic 



50. Anaerobic (Strict) 



I . Gelatin liquefied 



2 . Gelatin not liquefied 



0.1 Acid and gas from dextrose 



o . 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 growth with saccharose 



.0001 Nitrates reduced with evolution of gas 



.0002 Nitrates not reduced 



.0003 Nitrates reduced without gas formation 



.00001 Fluorescent 



.00002 Violet chromogens 



.00003 Blue chromogens 



.00004 Green chromogens 



.00005 Yellow chromogens 



.00006 Orange chromogens 



.00007 Red chromogens 



