ANNUAL REPORT, 1939 97 



PUBLICATIONS 

 Bulletins 



307 Breeding for Egg Production. By F. A. Hays and Ruby Sanborn. 36 pp. 

 June 1939. 



A revised and enlarged edition of a bulletin first published in 1934, 



presenting results obtained during 25 years of breeding work. It is 



intended as a guide to assist the poultry breeder in directing his operations. 



342 Facts, Fads, and Frauds in Nutrition. By Helen S. Mitchell and Gladys 



M. Cook. 31 pp. April 1939. 



A reprint of a bulletin issued in April 1937, somewhat revised and 

 brought up to date by the inclusion of statements regarding the Food, 

 Drug and Cosmetic Act. Valuable as a guide to the consumer. 



355 Annual Report for the Fiscal Year Ending November 30, 1938. 104 pp. 

 February 1939. 



The main purpose of this report is to provide an opportunity foi pre- 

 senting in published form, recent results from experimentation in fields 

 or on projects where progress has not been such as to justify the general 

 and definite conclusions necessary to meet the requirements of bulletin 

 or journal. 



356 Field Corn in Massachusetts. By William G. Colby and Ralph W. Donald- 

 son. 16 pp. February 1939. 



This study was undertaken to determine the climatic adaptation of a 

 large number of hybrid and open-pollinated corn varieties and also to 

 review the practices necessary for successful corn culture in this State. 

 A list of varieties tested, with maturity dates and yields over a three-year 

 period, is appended to furnish a basis for determining the suitability of 

 varieties for particular areas. 



357 The Effect of Feeding a Vitamin A Supplement to Dairy Cattle. By J. G. 

 Archibald and C. H. Parsons. 14 pp. March 1939. 



A vitamin A supplement in concentrated form was added to the grain 

 ration fed to dairy cattle during a period of 22 months to study its effect 

 on the growth and productive function of the animals as well as on milk 

 production. The results, although favorable to the supplement in their 

 trend, were not marked. However, since these cows were on better-than- 

 average rations, it is reasonable to assume that response to the supplement 

 might be greater under average farm conditions, and the slight additional 

 cost of grain mi.xtures fortified with a vitamin A concentrate seems a cheap 

 insurance against troubles due to deficiency of this vitamin, particularly 

 when the roughage is of poor quality. 



358 Blueberry Culture in Massachusetts. By John S. Bailey, Henry J. Franklin, 

 and Joseph L. Kelley. 20 pp. February 1939. 



This is a complete revision of a previous bulletin on blueberry culture 

 published in 1935 as Bulletin 317, and contains information on soil re- 

 quirements, selection of varieties, methods of propagation and culture, 

 pruning, insect and disease control, harvesting, and marketing of cultivated 

 blueberries. Suggestions are given for the improvement of the wild high- 

 bush blueberries which occur so abundantly in Massachusetts. 



359 Factors AflFecting Fertility in Rhode Island Reds. By F. A. Hays and Ruby 

 Sanborn. 15 pp. May 1939. 



A report on the behavior of fertility in a breeding program extending 

 over 15 years. Outside temperature during the period when hatching eggs 

 are laid had a specific effect on fertility — fertility increased steadily 

 as outside temperatures rose to about 37° F. Both males and females 

 showed a decline in fertility with increasing age, a decline less marked 

 in females than in males. All the evidence indicates that fertility is 

 controlled by factors other than inheritance and that selective breeding 

 to improve fertility would, therefore, be ineflfective. 



360 Farm Storages for New England Apples. By C. I. Gunness, W. R. Cole, 

 and O. C. Roberts. 32 pp. March 1939. 



Information on design and structure of common and cold storage 

 buildings, refrigeration equipment and operation, management of storage 

 houses, temperature and humidity control, and the physiology and hand- 



