22 



Scientific Proceedings (117). 



In this attempt to find a method by which the existence of two 

 antigenic varieties within the group of Bacillus botulinus could 

 be established without the recurrence to the toxin-antitoxin test 

 we found that neither the complement fixation nor the precipitation 

 tests give satisfactory results. The agglutination test, however, 

 offered a ready means for grouping as the results obtained with 

 this test were in accord with those obtained by toxin-antitoxin 

 tests. The agglutination test has permitted us to classify also 

 such strains of Bacillus botulinus which have lost their toxicity 

 under the conditions of test tube cultivation. As a control in all 

 the above experiments we included a strain of Bacillus sporogenes 

 and found that contrary to the statement in the literature all but 

 one of the strains obtained by us from different laboratories in 

 this country are free from Bacillus sporogenes contamination as 

 judged by the above serologic tests. 



12 (1759) 



The antiscorbutic potency of strawberries. 



By CLARENCE A. SMITH, OLAF BERGEIM, and PHILIP B. HAWK. 



[From the Laboratory of Physiological Chemistry of Jefferson Medical 

 College, Philadelphia, Pa.] 

 Several guinea pigs were fed a diet of oats, milk, and hay 

 until they were decidedly scorbutic. They were then given ex- 

 pressed strawberry juice, either fresh juice or juice previously 

 boiled for five minutes. The symptoms of scurvy were overcome 

 within seven days by the administration of ten c.c. per day of 

 either boiled or unboiled juice. Strawberries, therefore, appear 

 to be relatively rich in water-soluble C, and their content of this 

 vitamine is not seriously decreased by five minutes boiling. 



13 (1760) 



A modified anaphylactic reaction induced by X-rays. 



By R. G. HUSSEY (by invitation). 



[From the Rockefeller Institute for Medical Research, 

 New York City.] 



The following observations are of interest in connection with 

 a theoretical consideration of the mechanism of classical serum 

 anaphylaxis. 



