ANNUAL REPORT, 1920 379 



the feeding of supplementary minerals in the form of ground bone, ground lime- 

 stone and tlie like. In order to get additional light upon the subject, this Sta- 

 tion has conducted experiments with growing and mature dairy animals and 

 presents ita findings in Part I of this bulletin. 



As a part of the work, many determinations were made of the mineral con- 

 stituents of the grains and roughages fed, and likewise of the amount found in 

 the ordinary roughages grown in different sections of Massachusetts. These 

 analyses are brought together in Part II of this bulletin. 



256 The Cost of Government in Massachusetts, 1910-1926. Yount, Hubert 

 W., and Sherburne, Ruth E. 68 pp. November, 1929. 



The rapid increase in demand for public service, together with the resulting 

 ' increase in taxes, has placed a severe strain on farmers in many Massachusetts 

 towns. This study analyzes the costs of public service in such towns compared 

 with larger towns and cities, and points out the more important handicaps un- 

 der which small towns operate. 



257 The Cutaneous Vaccine for Fowl Pox. Pyle, Norman J. 20 pp. 

 December, 1929. 



Investigation of fowl pox at this Station has for its purpose the determination 

 of an efficient preventive and curative treatment for the disease. This is of 

 vital importance to the Massachusetts poultry industry because the disease 

 causes serious loss by decreasing egg production during the season when eggs 

 are highest priced. 



The study of the cutaneous vaccine, as here reported, included investigations 

 of its efficiency, its practical use and method of administration, its action on 

 body weight, temperature, and early egg production, and the duration of im- 

 munity which followed its administration. 



258 Inbreeding in Relation to Egg Production. Hays, F. A. 48 pp. 

 December, 1929. 



For many years inbreeding has been successfully used in establishing poultry 

 breeds where foundation stock was available only from very diverse sources. 

 In recent years, however, work in this field has been confined largely to flocks 

 of an established breed, and the value of inbreeding from such restricted foun- 

 dation stock is questionable. The experiment here reported was planned to 

 show the effect of various degrees of inbreeding within a so-called established 

 breed — in this case Rhode Island Reds. 



259 Rate of Growth in Rhode Island Reds. Hays, F. A., and Sanborn, 

 Ruby. 20 pp. December, 1929. 



In selecting birds for various purposes, poultrymen make extensive use of body 

 weight as an index of the characteristics desired. The weight records presented 

 in this report cover an eleven-year period on all living individuals in a flocl< 

 bred primarily for high fecundity and show something of their significance. The 

 results may serve as guides to the weights which may be expected in this breed 

 if high fecundity is the chief goal, when methods of management and climatic 

 conditions are comparable. 



Control Bulletins 



44 Inspection of Commercial Fetdstuffs- Smith, Philip H., and others. 

 28 pp. November, 1928. 



45 Inspection of Comn.ercial Fertilizers. Haskins, H. D., and others. 

 47 pp. December, 1928. 



46 Inspection of Agricultural Lime Products. Haskins, H. D., and Good- 

 win, M. W- 6 pp. December, 1928. 



47 Seed Inspection. Smith, Philip H., and others. 11 pp. February, 

 1929. 



48 Eradication of Pullorum Disease in Massachusetts, 1928-1929. H"in- 

 shaw, W. R., and others. 36 pp. July, 1929. 



49 Seed Inspection. Smith, Philip H., and others. 55 pp. October, 1929. 



