BULLETIN 167: MICRO-ORGANISMS 01 MAPLE SAP. 



Part I. Micro-organisms Occurring in Maple Sap and their 

 Influence on the Color, Flavor and Chemical ComposU 

 tion of Sirup. 



By II. A. Edson 



Fart II. Discussion of Physical and Chemical Data Secured 

 on Maple Sirups Obtained from Saps Inoculated with 

 — Micro-organisms. 



By C. I J. Jones 



Part III. Technical Description of Certain Bacteria Occur= 

 ring in Maple Sap. 



A. Description of Bacillus aceris (n. sp.). 



B. Brief Description of the Pink Cocci of Maple Sap. 



C. The Green Fluorescent Bacteria Occurring in Maple 



Sap. 



By H. A. Edson and C. W. Carpenter 



The completion of the studies reported in Tart I and in 

 Part HI (A) of this bulletin was made possible through the 

 courtesy of the Chief of the Bureau of Plant Industry of the 

 United States Department of Agriculture. The author of those 

 parts, the former station bacteriologist, when he withdrew from 

 station employ to enter that of the Department, had not pursued 

 the investigation far enough to warrant final publication. The 

 Chief of the Bureau generously allowed him to continue his 

 work after he had become connected with the Department dur- 

 ing the succeeding sugar season, at intervals during the year, 

 and for several months early in [912 while preparing the mat- 

 ter for the press. Had it not been for this cordial cooperation, 

 the matter could hardly have been brought to a successful issue ; 

 and the Station gratefully acknowledges its obligation for the 

 courtesy. 



J. L. Hills, Director. 



