ANNUAL REPORT, 1936 95 



Reports of Investigation in Journals 

 Numbered Contributions 



216 Resistance to Cladosporium fulvum. E. F. Guba. Phytopath. 16(4): 

 382-386. 1936. 



The breeding of greenhouse tomatoes resistant to leaf mold is receiving attention in 

 several countries, and it now appears probable that large-fruit tomatoes completely resis- 

 tant to the disease will be developed. 



221 The use of an electric steam generator for the sterilization of dairy 

 utensils on the farm. H. G. Lindquist. Milk Plant Monthly, January 

 1936. 



A small electric steam generator for sterilizing dairy utensils, now on the market, is de- 

 scribed. It is simple in construction, easy to operate, and required about 0.85 KWH of 

 current per hour. Utensils were rendered practically sterile in from 4 to 7 minutes, and 

 dried out in a few minutes after removal from the sterilizer. It can be used without 

 causing dust, dirt, or odors, and without any increase in fire hazard. 



223 Nutritive value of the blue crab (Callinectes sapidus) and sand crab 

 (Platyonichus ocellatus Latreille). Vernon K. Watson and Carl R. Fellers. 

 Amer. Fisheries Soc. Trans. 65 (1935) :342-349. 1936. 



The sand crab and the blue crab are very similar in chemical composition and food value. 

 The meat is a high-protein food, high in mineral content and alkalinity, and of medium 

 calorific value. The protein of both species was approximately equal to beef protein in 

 biological value. 



224 Detection and significance of Escherichia coli in commercial fish and 

 fillets. Francis P. Griffiths and James E. Fuller. Amer. Jour. Pub. 

 Health 26(3) :259-264. 1936. 



Twenty-six commercial haddock fillets and five eviscerated haddock were bought at 

 local retail markets and examined. Typical Escherichia coli were found on sixteen of the 

 fillets and on two of the eviscerated fish. Further investigation is recommended, to study 

 the possibility of using the occurrence of Escherichia coli as an index of the sanitary quality 

 of marine fish and fillets. 



226 Inheritance of sexual maturity in Rhode Island Reds. F. A. Hays. Sixth 

 World's Poultry Congress, Berlin-Leipsic 2:34-38. 1936. 



Crosses are reported within the Rhode Island Red breed, using an early-maturing pro- 

 duction-bred strain and a late-maturing exhibition-bred strain. It was shown that early 

 maturity depends upon dominant genes, both sex-linked and autosomal genes being in- 

 volved. The earliest maturing phenotype results when both the sex-linked and the 

 autosomal gene are present; the intermediate phenotype comes from the presence of either 

 the sex -linked or the autosomal gene; and the late-maturing phenotypes are recessives 

 lacking both dominant genes for early maturity. 



229 Diagnosis of plant troubles with diphenylamine. Linus H. Jones. Plant 

 Physiol. 11:207-209. 1936. 



The diphenylamine test is frequently used as a means of determining a plant's need for 

 nitrogen. Many tests made on different parts of plants showed in general that an actively 

 growing plant part may give a negative test because the nitrate is being used in growth and 

 therefore does not accumulate in the adjacent tissues; while older parts of the plant where 

 active growth has ceased may give a positive test. The test is useful in diagnosing plant 

 troubles only in cases where nitrates are involved. 



230 The physiology of spermatozoa. Ralph W. Phillips. Amer. Soc. Anim. 

 Prod. Proc. 1935:222-235. 1936. 



A survey of the literature on the physiology of spermatozoa calls attention to the fact 

 that knowledge is yet scanty in many phases of the problem. There is need for much 

 further work, particularly with farm animals, in order to develop a sound basis for recom- 

 mendations concerning the management and use of sires. 



231 Chemical composition and fermentation studies of citron. C. R. Fellers 

 and E. G. Smith. Jour. Agr. Research 53 (ll):859-867. 1936. 



The citron is characterized by high moisture; medium sugar, ash, and fat; and low 

 fiber. Ash analysis shows moderate amounts of calcium, potash, phosphorus, and copper, 

 but low iodine. The fresh unripe citron is very rich in vitamin C, but little is retained in 

 the fermented citron and probably none in the candied peel. The vitamin A content is 



