No. 2. September, 19201 UNCLASSIFIED PUBLICATIONS 315 



a warm stage, and the filter paper ring must be replaced by a small drop of saline solution, 

 only two or three times as large as the micro-drop. When the observation is complete, the 

 large drop of medium is added, the slip is transferred to a moist cell containing paper ring, 

 and the preparation is incubated as before. — The advantages of this method are that no spe- 

 cial skill or practice is called for, no special preparation is needed, and the work can be per- 

 formed with the ordinary apparatus found on a bacteriological bench; the time required is 

 only one or two hours. — Julia Moesel Haber. 



2422. RunoLFS, W. Experiments on the value of common rock salt and sulfur for killing 

 stumps. Soil Sci. 9: 181- 189. PL 1-2. 1920. — Sulphur applied to high or low brush stimu- 

 lated the growth of the live tree stumps. Rock salt up to 2.5 tons per acre did little harm 

 while 0.5 to 1 ton per acre acted as a fertilizer. Applications of 2 to 3 tons per acre of sodium 

 chloride to stumps cut in the winter killed or severely injured them. The salt should be 

 applied in the spring just before the leaves appear. — W. J. Robbins. 



2423. Sagaspe, M. J. Sur la Digltale (Digitalis purpurea). [A note concerning Digitalis 

 purpurea.] Actes Soc. Linn. Bordeaux. Proces-verbaux. 68: 64-65. 1914. — Three mon- 

 strosities of Digitalis purpurea are briefly described. — W. H. Emig. 



2424. Trowbridge, P. F. Report of the director, July 1, 1917, to June 30, 1919. North 

 Dakota Agric. Exp. Sta. Bull. 136. 23 p., 3 fig. 1920. — This embraces the annual report of 

 the station for two years. A brief summary is given of the experimental work including a 

 limited amount of data. — L. R. Waldron. 



2425. Waksman, Selman A. The industrial application of enzymes of Aspergillus oryzae. 

 [Abstract.] Absts. Bact. 4: 7. 1920. — The enzymes of A. oryzae hydrolyze starch completely 

 whereas malt diastase does not; and the quantity of starch hydrolyzed is 4 to 6 times greater. 

 The enzymes are useful in the textile industry for removing "size," in clearing fruit extracts 

 which contain some starch, and in the manufacture of various starch derivatives. [From 

 author's abst. of paper read at scientific session, Soc. Amer. Bact.] — D. Reddick. 



2426. Wyant, Zae Northrup. Experiments in silage inoculation. [Abstract.] Absts. 

 Bact. 4: 6. 1920. — Various strains of lactic acid producing bacteria were used to inoculate 

 ensilage. After fermentation for 5 weeks the ensilage proved very palatable to calves. — 

 Platings were made from the interior to determine whether the types introduced predominated 

 or not. From the first pair of inoculations with Bact. lactis acidi and Bact. bulgaricum the 

 first organism was recovered without difficulty, the latter not at all. The organisms which 

 predominated in each silo were short rods in pairs which resemble Bact. lactis acidi in mor- 

 phology, spore-forming rods, and a few yeasts. [From author's abst. of paper read at scien- 

 tific session, Soc. Amer. Bact.] — D. Reddick. 



