1922] WILLAMAN & SANDSTROM—SCLEROTINIA 305 
Nitrites could not be detected in any of the samples. They 
are probably not a product of the rotting by this fungus. No 
hypothesis can be suggested as yet for the chemical and physio- 
logical basis of resistance in the brown rot of stone fruits. 
DIvIsIon oF AGRICULTURAL BIOCHEMISTRY 
MINNESOTA AGRICULTURAL ay see 
St. Paur, MInn. 
LITERATURE CITED 
. Association of Official Agricultural Chemists. Methods of Analysis. 
Baltimore. 1916. 
. Atti, M. D. (Sap acidity and disease resistance in grape varieties). Ann. 
R. Scuola Sup. Agric. Portici 2. ser. 14:24. 1916-1917. 
. Bassett, H. P., and THompson, FrrMAN, Preparation and properties of 
an enzyme occurring in fruits. Jour. Amer. Chem. Soc. 33:416-423. 1910. 
. Benrens, J., Beitrige zur Kenntnis der Obstfaulnis. Cent. Bakt. II. 
42514-522; 547-553; 577-585; 635-644; 700-706; 739-746; 770-777. 18908. 
BIGELow, W. D., and Dunsar, P. B:, The acid content of fruits. Jour. 
Ind. and Eng. Chem. 9:762-767. 1917. 
. Bissy, G. R., Studies on Fusarium diseases of potatoes and truck crops in 
Minnesota. Minn. Agric. Exp. Sta. Bull. 181. 1910. 
BLACKMAN, ., and WELsForD, E. J., Studies in the physiology of 
we IL. Infection by Botrytis cinerea. Ann. Botany 30:389-398. 
al 
Nu 
w 
> 
¥ 
a 
rs 
a 
Butsu, M. J., A study of the non-protein nitrogen of wheat flour. Jour. 
Biol. Chem. 33:551-559. 1918. 
- Boas, Friepricu, Weitere Untersuchungen iiber die Bildung léslicher 
Starke bei Schimmelpilze mit besondere Beriicksichtigung der Frage nach 
Eiweisssynthese der Schimmelpilze. Biochem. Zeit. 86:110-124. 1918. 
- Boncqvet, P. A., Presence of nitrites and ammonia in green plants. Its 
significance with regard to crop rotation and soil depletion. Jour. Amer. 
Chem. Soc. 38:2572-2576. 1916. 
11. Boncquet, P. A., and Boncquet, M., Presence of nitrites and ammonia 
in diseased plants. II. Oxidases and diastases; their relation to the dis- 
turbance. Jour. Amer. Chem. Soc. 37:2088-2093. 1917. 
12. Brown, Wa., Studies in the physiology of — I. The action of 
Born cinerea. Ann. Botany 29:313-348. 
, On the physiology of parasitism. Ne ew Patel 16:109-126. 1917. 
14. CLEVENGER, C. B., Hydrogen-ion concentration of plant juices. it. 
Factors affecting the acidity or hydrogen-ion concentration of plant juices. 
Soil Science 8: 227-242. 1919. 
15. Comes, Orazio, Della ceclatenie dei frumenti alle Ruggini. Stato attuale 
della quistione e provvedimenti. Atti. R. Ist. Incoragg. Napoli 
64: 419-441. 1013. 
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