258 MORPHOLOGY AND TAXONOMY OF FUNGI, ETC. [Bot. Absts., Vol. V, 



1970. Pammel, L. H. Perennial mycelium of parasitic fungi. Proe. Iowa Acad. Sci. 25: 

 259-263. 1920.— See Bot. Absts. 5, Entry 2082. 



1971. Peyronel, B. Sul nerume o marciume nero dalle castagne. [On the blackening 

 or black rot of chestnuts.] Staz. Sperim. Agrarie Italiane 52:21-41. PI. 1-4. 1919. — See Bot. 

 Absts. 5, Entry 2083. 



1972. Reinking, Otto A. Phytophthora Faberi Maubl. : The cause of coconut bud rot in 

 the Philippines. Philippine Jour. Sci. 14: 131-151. 3 pi. 1919.— See Bot. Absts. 5, Entry 

 2087. 



1973. Rettger, Leo F., and C. C. Chen. Correlation within the Colon-Aerogenes group. 

 [Abstract.] Absts. Bact. 3 : 1. 1919. — 467 cultures isolated from soil, 20 of which were of colon 

 type, and 173 from animals all of which were colon type. Media used were (1) Clark and Lubs 

 medium with Witte's peptone, (2) the same with "Difco" peptone, (3) their synthetic 

 medium. "A total of 3725 individual hydrogen ion concentration determinations and 4632 

 Voges-Proskauer reactions were made. The P H was determined by the colorimetric method 

 of Clark and Lubs; the dyes used being brom-thymol blue for the aerogenes group and methyl 

 red for the colon type. Brom-cresol purple was used to check the P H values of the other 

 two dyes, especially in the range 5.6 to 6.4. The result showed that a three days incubation 

 period was not sufficient for the methyl red test in these media; but an almost perfect corre- 

 lation between the two types was observed in the synthetic as well as in the Witte's peptone 

 medium (not in the Difco) when the incubation period was prolonged to 5 days. — The results 

 of the Voges-Proskauer tests showed that this test can be made in either of the three media, 

 and that the usual incubation period can be shortened from 5 days to 24 hours (even to ten to 

 fourteen hours). A positive reaction may be obtained by the simple and rapid "shake" 

 method in which the eosin-coloration can be observed for 1 to 3 hours, and its maximum color 

 production from 2 to 8 hours. The method of Levine in which an oxidizing agent is used, 

 and that of Bunker, Tucker and Green in which they expose a thin layer of culture fluid in 

 a Syracuse watch glass both proved either uncertain or too laborious. — With the few excep- 

 tions which occurred among the colon strains from soil, the uric acid test of Koser gave very 

 satisfactory correlation with the other reactions when the necessary precautions were taken. 

 — The effect of a mixture of colon-aerogenes types of organisms upon the P H and upon the 

 Voges-Proskauer test was determined. It was found that the P H concentration was disturbed 

 between types when such a mixed culture was used, while the Voges-Proskauer reaction proved 

 to be relatively permanent. — The limiting P H concentration of the colon-aerogenes types of 

 organisms was determined daily in the synthetic medium of Clark and Lubs for a period of 

 3 weeks. The result showed that the P H concentration ranged from 4.7 to 7.4 within that 

 period." [From authors' abst. of paper read at scientific section, Soc. Amer. Bact.] — D. 

 Rcddick. 



1974. Rettger, Leo F., and Margaret M. Scoville. Bacterium anatis, Nov. Spec, 

 an organism of economic importance and a member of the paratyphoid group. [Abstract.] 

 Absts. Bact. 3: 8. 1919. — An organism resembling very closely B. paratyphosus B. was iso- 

 lated from the internal organs of ducklings which had succumbed. "Indeed so similar were 

 the morphology, cultural characters, etc., of the new organism and different strains of B. 

 paratyphosus' B. that it has as yet been impossible to differentiate them, although agglutina- 

 tion tests still remain to be made." [From abst. of paper read at scientific session, Soc. Amer. 

 Bact.] — D. Reddick. 



1975. Rippel, August. Die chemische Zusammensetzung von Lactaria piperita (Scop.) 

 und Lacteria vellerea (Fries). [The chemical composition of Lactaria piperita (Scop.) and 

 Lactaria vellerea (Fries.).] Naturw. Zeitschr. f. Forst- u. Landw. 17: 142-146. 1919.— A 

 chemical analysis of the two varieties, which are difficult of distinction to the beginner, is 

 given in two tables. A comparison shows a similar content of phosphoric acid and potassium. 

 Crude fats are slightly more abundant in vellerea, and greater in both than in other fungi. 



