REPORT OF THE COMMITTEE ON THE DESCRIPTIVE 



CHART FOR 1919 



H. J. CONN, Chairman, H. A. HARDING, I. J. KLIGLER, W. D. FROST, 

 M. J. PRUCHA, and H. N. ATKINS 



Presented at the Boston Meeting of the Society of American Bacteriologists, 



December 29, 1919 



PART I. METHODS OF PURE CULTURE STUDY. REVISED 



The 1917 report of this committee contained a description of 

 the methods recommended to be used with the Descriptive Chart. 

 Copies of the report have been on sale by the Society and the first 

 edition is now practically exhausted. Opportunity is therefore 

 taken to revise the report, printing it in the Journal of Bac- 

 teriology to call it to the attention of the members of the Society, 

 the reprints to be placed on sale as before. As soon as these re- 

 prints are available, one copy will be furnished with every order 

 for Descriptive Charts, and additional copies may be obtained for 

 15 cents apiece postpaid, or if five or more copies are ordered, 

 for 10 cents each, transportation not postpaid. Orders for these 

 reports, as well as for the Descriptive Charts, are to be sent to 

 the chairman of the committee (address Geneva, N. Y.). 



Methods are given in this report for all the determinations 

 listed on the 1917 chart (recommended for instruction) but meth- 

 ods have not yet been prepared for all the determinations called 

 for by the older chart. As the chart designed for instruction is 

 now in most general use, it has seemed wisest to give further at- 

 tention to these few methods rather than to do work on some of 

 the other, less frequently used, determinations. The methods 

 given here are not to be considered official. They are merely the 

 best that have come to the attention of the committee at the 

 present time. Criticisms and suggestions are at all times wel- 

 come, in order that future editions of this report may be brought 

 up-to-date. 



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