344 MASS. KXPKRIMFA'T STATION BULLETIN 247 



241 Food Consumption of Rural School Children in Kelat'on to Their 

 Health. Davies, Esther S. 51 p. March, 1928. 



A field study was made of two Massachusetts rural towns, to ascertain what rela- 

 tionships, if any, could be demonstrated between the dietary habits of children of 

 elementary school age and their state of health. The investigation included visits 

 to the homes of the children, inspection of .school lunches, and dental and medical 

 examinations. The study showed that most of the diets were of poor quality from 

 the standpoint of the nutritional needs of the child. The most outstanding differ- 

 ence between the children of the two towns was in the condition of their teeth. 

 The excellence of the teeth of one group as compared with the other is believed to 

 have as its chief causal factor the high consumption of milk in the former town 

 and the low milk utilization of the latter. 



242 Vigor in Production-Bred Flocks. Hays, F. A. and Sanborn, Ruby. 

 26 p. April, 1928. 



In pedigree breeding for high fecundity, the question of vigor is of paramount 

 importance, because the mortality rate tends to become higher as egg production 

 increases. In the Rhode Island Red flock studied, vigor was found to be independ- 

 ent of the fecundity traits, early maturity, high intensity, non-pauie and high 

 persistency : but to be reduced by eliminating broodiness. The most feasible prac- 

 tice for improving vigor is to breed only from those families showing the lowest 

 mortality of pullets in the laying houses. 



243 The Mcintosh Apple on the New York Market. Jefferson, Lorian P. 



12 p. May, 1928. 



Data are presented showing the demand for Mcintosh apples in New York City, 

 the total volume received from the different sections producing Mcintosh, and a 

 comparison of the prices received for Mcintosh from the different sections. Two 

 conclusions seemed justified: The demand for Mcintosh in New York has never 

 been supplied, and the testimony of dealers indicates that the market will absorb 

 many times what it now receives ; the New England Mcintosh are in general equal 

 to any that are received in New York, as indicated by the prices received. A 

 carlot of apples, shipped from New England to New York in the spring of 1928 

 was traced to the consumer to learn how the shipment was handled, how widely 

 the apples were distributed, how many jobbers and retailers were concerned with 

 the distribution, and the type of consumers to whom they were finally sold. The 

 details of this shipment are reported. 



244. Type-of-Farnunu; Areas in Massachusetts. Mighel, Ronald L. cand 

 Brown, Marian. 16 p. June, 1928. 



This study was made as a basis for future investigational work, and because a 

 knowledge of existing farm conditions and how they have developed is essential 

 to wise farm planning and administration. The bulletin defines thirteen different 

 areas on the basis of soil, topography and type of farming, and shows in both 

 graphical and descriptive form the distribution of the principal crop and live 

 stock enterprises in the State according to the United States Census of 1925. 



245. Bliii'ht and Leaf-spot of Carrot in Massachusetts. Doran, W. L. 

 and Cuba, E. F. 9 p. June, 1928. 



The economic importance, causes and control measures of these diseases are dis- 

 cussed. The use of fungicides in the field is warranted only in the most rainy 

 seasons. Crop rotation is of some value as a control, but seed treatment is not. 



246 Control of Red Spider and Powdery Mildew on Greenhouse Cucum- 

 bers. Whitcomb, W. D. and Guba, E. F. 16 p. 



Effective treatments for controlling red spider and powdery mildew individually 

 on greenhouse cucumbers have been developed. White mineral oil emulsion and 

 sulfur, which are recognized as the most effective materials for controlling red 

 spider and powdery mildew respectively, are not compatible. The proper choice 

 of fungicides for controlling powdery mildew when white mineral oil emulsion is 

 used is suggested. In addition, the nature, method, and rate of application of 

 fungicides are considered in relation to the health of the foliage, weather condi- 

 tions, and the location of the fungus. 



