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Evidence expérimentale du manque de vitamine dans l'alimentation.
By Lafayette B. Mendel. Bull. Soc. Scient. d'Hyg. Alimentaire,
1924, XII, 29. Nutrition: The Chemistry of Life.
By Lafayette B. Mendel. Yale University Press, 1923, pp. xii +150. Investigation on the Nitrogenous Metabolism of the Higher Plants.
V. Diurnal Variations in the Protein Nitrogen of Runner-Bean Leaves.
By Albert Charles Chibnall. Biochem. J., 1924, XVIII, 387-394. Investigations on the Nitrogenous Metabolism of the Higher Plants.
VI. The Role of Asparagine in the Metabolism of the Mature Plant.
By Albert Charles Chibnall. Biochem. J., 1924, XVIII, 395-404. Investigations on the Nitrogenous Metabolism of the Higher Plants.
VII. Leaf Protein Metabolism in Normal and Abnormal Runnerbean Plants.
By Albert Charles Chibnall. Biochem. J., 1924, XVIII, 405-407. Some Nitrogenous Constitutents of the Juice of the Alfalfa Plant. I.
The Amide and Amino Acid Nitrogen.
By Hubert Bradford Vickery. J. Biol. Chem., 1924, in press. Some Nitrogenous Constituents of the Juice of the Alfalfa Plant. II.
The Basic Nitrogen.
By Hubert Bradford Vickery. J. Biol. Chem., 1924, in press. Pathogenesis of the Ocular Lesions Produced by a Deficiency of Vitamine A.
By Arthur M. Yudkin and Robert A. Lambert. J. Exp. Med., 1923,
which Result from a Deficiency of Vitamine A.
By, Arthur M. Yudkin. Arch. Ophthalmology, 1924, in press. Diseases of Connecticut Vegetables in 1923.
By G. P. Clinton. Rept. Conn. Veg. Growers' Assn. (1923) p. 45. Injuries and Diseases of Connecticut Fruits in 1923.
By G. P. Clinton. Rept. Conn. Pom. Soc. (1923) p. 37.
Strawberries for the Control of Fruit Rots.
Agr. Circ. 309, p. 1.
By G. P. Clinton. The New Eng. Farmer, Vol. 49, p. 1.
By E. M. Stoddard. Seed World, Vol. 15, No. 11, p. 34; Vol. 16, No. 8,
Report of Committee on Injurious Insects.
By W. E. Britton, Conn. Pom. Soc. Proceedings (1924) p. 41. Some Insects to be Combated Next Season.
By W. E. Britton, Conn. Pom. Soc. Proceedings (1924) p. 72. Insects Attacking Vegetable Crops in Connecticut in 1923.
By W. E. Britton, Rept. Conn. Veg. Growers' Assn. (1924) p. 43. An Asiatic Beetle (Anomala orientalis) in Connecticut.
By W. E. Britton. Jour. Econ. Ent. (April 1924) Vol. 17, p. 309. The Gipsy Moth and Our Forests.
By W. E. Britton. New Eng. Farms (June 21, 1924.) Connecticut Tree Workers' Institute.
By W. E. Britton. Florists' Exch. (March 22, 1924), Vol. LVII, p.
Proceedings, Shade Tree Conference.
By W. E. Britton. Florists' Exch. (Sept. 6, 1924), Vol. LVIII, p. 703. Meeting of Connecticut Entomologists.
By W. E. Britton. Jour. Econ. Ent. (Dec., 1924), Vol. 17, p. 669. Control of European Red Mite in Connecticut.
By Philip Garman. Conn. Pom. Soc. Proceedings (1924) p. 44. Factors Influencing the Effectiveness of Arsenate of Lead.
By Philip Garman. Florists' Exch. (Sept. 6, 1924), Vol. LVIII, p. 685. The Raspberry Fruit Worm.
By B. H. Walden. Conn. Pom. Soc. Proceedings (1924) p. 124. Results of Dusting versus Spraying in Connecticut Apple and Peach
Orchards in 1922.
1924), Bull. Series No. 4, p. 2. Progress of Spraying and Dusting Experiments. By M. P. Zappe and E. M. Stoddard. Conn. Pom. Soc. Proceedings
(1924) p. 52. Accomplishments in the Past Year in Anti-Mosquito Work in Connecti
Some Insect Information from a Connecticut Conference.
By W. E. Britton. Florists' Exch. (Nov. 29, 1924), Vol. LVIII, supplt.
By P, C. Mangelsdorf. Science (Sept. 1924). Vol. 60, p. 222. Selective Fertilization among the Gametes from the Same Individuals.
By D. F. Jones. Proc. of the National Acad. Sciences (June, 1924),
Vol. 10, p. 218.
By D. F. Jones. Jour. Heredity (July), 1924), Vol. 15, p. 291.
By P. C. Mangelsdorf. Jour. Heredity (Aug.-Dec., 1922), Vol. 13, p.
359. The Inheritance of Defective Seeds in Maize.
By P. C. Mangelsdorf. Jour. Heredity (June, 1923), Vol. 14. p. 119. Land Cover Studies as a Basis for a More Accurate Interpretation of the
PHYSICAL EQUIPMENT. The removal of the Board of Health Laboratory to Hartford made available the lower floor and basement of the old Botany building, in which a very complete Soils laboratory has been installed. The small greenhouse has been repaired and will be used for pot experiments.
About 900 volumes were added to the library, which now contains 11,800 volumes.
REPORTS OF DEPARTMENTS.
Dr. E. M. Bailey in charge. 1. Control of Fertilizers. Eight hundred and eighty samples of commercial fertilizer have been analyzed, the results reported to the manufacturer and others interested, and the complete data classified and arranged for publication.
2. Inspection of Feeding Stuffs. Three hundred and fifty-two samples of commercial feeding stuffs and other fodder materials have been examined and the results published together with a discussion of the law relating to this subject.
3. Inspection of Foods and Drugs. Control and investigational work on food products and drugs has entailed the examination of about 1,800 samples.
4. Calibration of Babcock Glassware. Nearly 4,000 pieces of Babcock glassware have been checked for accuracy of calibration.
5. Inspection of Insecticides and Fungicides. About 70 samples of spraying and dusting materials were examined and the results published together with the text of the insecticide law recently enacted and rules and regulations for its enforcement as formulated jointly by the Director of this Station and the Dairy and Food commissioner.
6. Studies on Methods. Collaborative work has been carried on with the Association of Official Agricultural Chemists upon methods for the analysis of spices and other condiments and of cacao products.
7. Analysis of Diabetic Foods. The station has collaborated with the Council on Pharmacy and Chemistry of the American Medical Association on the subject of diabetic and special foods.
8. Analysis of Check Samples-Cottonseed Meal and Mixed Fertilizers. The Station has collaborated with the American Oil Chemists Society and the F. S. Royster Guano Co., in the analyses of check cottonseed meal and mixed fertilizers.
Dr. T. B. Osborne in charge. (In collaboration with Dr. L. B. Mendel, Yale University.)
PROTEIN RESEARCH AND NUTRITION STUDIES. 1. A Study of the Proteins of Green Plants. Investigations of the constituents of the alfalfa plant have been continued. New methods of fractionation have been developed and have indicated the presence in alfalfa juice of new substances, including a new base, not yet identified. A protein with no carbohydrate impurity has been derived from cell cytoplasm of the spinach plant, by a new method of separation. Its isolation in a state of purity will be of importance in the study of the chemistry of the living cell.
2. The Relation of the Chemical Constitution of the Diet to the Development of Rickets. (With Dr. Park of the Yale School of Medicine.) Observations are being attempted under conditions of carefully controlled diet. Diets of purified food substances have been formulated which lead to the development of either rachitic or osteoporotic changes in the bones. It is inadvisable as yet to form generalizations from the extensive data collected.
3. Studies of the Relation of Vitamines to Nutrition. Experiments show that when smaller doses of protein-free vitamine B concentrate are fed to larger animals a decline in weight ensues; with intermediate doses there may be maintenance at various levels of body weight; with the larger vitamine B intake for the smaller animals growth ensues.
The Part Played by Proteins, Carbohydrates and Fats in Nutrition. With cooperation of Drs. Park and Winternitz of the Yale School of Medicine.) The extent to which preformed carbohydrates are essential in metabolism, and the development of hypertrophy of the kidneys in protein-fed rats were further investigated. The success of varied types of experiments on diets extremely unlike those of every day experience seems to indicate that surprisingly large variations in the quantitative make-up of the diet may apparently be tolerated so long as the “law of minimum” is not violated.
5. The Effect on the Eye of a Deficiency of the Fat Soluble Vitamine. (With Dr. Judkin of the Yale School of Medicine.) It was found that ophthalmia occurs among rats living on "purified" Vitamine A free diets to a percentage as high as 82.
6. The Effect of Diet on Fertility. (With Dr. Mason of the Yale School of Medicine.) On our "standard" casein diet, which has proved adequate for growth but not for reproduction, definite degeneration of the germ cells of the testes of rats, reared from weaning on the casein diet, was recorded. Ordinary mixed diet has not restored sterile rats to a normal condition after periods of 100 days.
7. The Relation of the Chemical Structure of the Proteins to their Nutritive Value. Much remains to be learned concerning the part played in nutrition by the various amino-acids which proteins yield on digestion. As a preliminary to further study in this field much time has been devoted to preparing large quantities of pure amino-acids which can be used in feeding experiments.
Dr. G. P. Clinton in charge. 1. The Effect of Fertilizers, Especially Nitrate of Soda, on the Growth, Yield, Longevity and "Yellows" of Peaches. Since it was started in 1909, records in this experiment have been kept on the health and length of life of each tree, of the growth in diameter of the trunk during the earlier years and of the yield from each during the bearing years. Since 1916 nitrate of soda has been the fertilization used on each of the nine different blocks,
Serious drought in July 1924, and later, a severe hail storm, practically ruined the season's crop. The chief causes of failures and poor crops have been winter and drought injuries, fungi and insects being secondary in importance.
2. The Nature and Cause of Mosaic Disease of Plants. The cause of mosaic disease still remains in doubt, altho interesting observations have been made, some of them apparently new. The experiment represents a continuation of work on Calico of Tobacco published several years ago, and is chiefly concerned with that host and the relationship of its mosaic to other hosts. The work of the past two years has been chiefly microscopic and with varied infectional experiments outdoors and in the greenhouse.
3. The Ustilaginales of North America. This is a supplement to the work the writer published some years ago. During the winter material was partially assembled but not completed. The work may be finished for publication during the coming year.
4. The Rusts of Connecticut. This is a list of the rusts, with their hosts, so far collected in this state. Their distribution is given by towns, together with the dates of collection, collectors, and occasional notes. Every town in the state is represented by one or more collections. Total collections now number more than 2,500, representing nearly 120 species and 20 genera. The manuscript for publication, including keys to the genera and species, has been partially prepared.
5. Plant Disease Survey of Connecticut. Altho a dry season was experienced, on the whole rather unfavorable for fungous diseases, the Disease Survey for 1924 includes more than the usual number of notes on distribution, etc. Two or three new bacterial diseases of economic plants were listed for the first time. Preliminary reports to the U. S. Bureau of Plant Industry have been made.
6. Thielavia Basicola, & Study of the Perfect Stage. Evidence has accumulated that the conidium-chlamydospore strains and the perithecial strains do not belong to the same fungus, altho the perithecia have been hitherto considered the perfect stage of Thielavia basicola. Successful crossings besides those