248 MASS. EXPERIMENT STATION BULLETIN 280 



tages. A result of this interest has been a pronounced demand for reliable information con- 

 cerning the comparative merits of different types of containers. The investigation reported 

 in this bulletin was begun in response to this demand, and has given results which are applic- 

 able either to the production of greenhouse plants in wholesale quantities or to the growing 

 of a single house plant. 



278 Infectious Laryngotracheitis Carriers. Charles S. Gibbs. 12 pp. Decem- 

 ber, 193 L 



The investigations on infectious laryngotracheitis for the past year at this Station have 

 centered largely around carrier problems and control measures. While the goal has not been 

 reached, important advances have been made, and the disease can now be handled under 

 laboratory conditions more effectively than it was a year ago. The results contained in this 

 paper are in no sense complete, but are published in the hope that poultrymen and others 

 interested in the control of infectious laryngotracheitis may find in them some practical 

 applications under field conditions. 



279 Onion Spraying and Dusting Experiments. W. L. Doran and A. I. Bourne. 

 12 pp. December, 1931. 



In 1927 and 192S seed onions died prematurely in the Connecticut Valley of a disease 

 here designated as blast. In earlier years, downy mildew of onions has also sometimes caused 

 a reduction in yields. The field experiments here described were undertaken with the object 

 of learning to what extent fungicides will protect onions against these diseases. 



Control Bulletins 



58 Eleventh Annual Report on Eradication of Pullorum Disease in Massachu- 

 setts. H. Van Roekel. 24 pp. May, 1931. 



59 Inspection of Commercial Feedstuffs. Philip H. Smith. 49 pp. 1931. 



60 Inspection of Commercial Fertilizers. H. D. Haskins. 50 pp. December, 

 1931. 



61 Inspection of Agricultural Lime Products. H. D. Haskins and H. R. DeRose. 

 6 pp. December, 1931. 



Meteorological Reports 



505-516, inclusive. Montlily reports giving daily weather records, together with 

 monthly and annual summaries. C. I. Gunness. 



Reports of Investigation in Journals 



(Numbered Contributions) 



108 Increase in Egg Weight during the Pullet Laying Year. F. A. Hays. Poultry 

 Sci. Assoc. Proc. 1930. 



109 Linkage Relations between Genes for Egg Size and Genes Concerned in 

 High Fecundity in Domestic Fowl. Frank A. Hays. Proc. World's Poultry 

 Congress, 1930:134-138. 



110 Effect of the Structure and Moisture of Plant Containers on the Tempera- 

 ture of Their Soil Contents. Linus H. .lones. .lour. Agr. Research 42:375- 

 378. March 15, 1931 . 



112 Calcium Requirements of Dairy Heifers. J. B. Lindsey, J. G. Archibald, 

 and P. R. NeLson. Jour. Agr. Research 42:883-896. June 15, 1931. 



113 Saprophytic and Secondary Microorganisms Occurring in the Respiratory 

 Tracts of Domestic Fowls and Chickens in Health and Disease. Charles 

 S. Gibbs. Jour. Bact. 21:97-109. February, 1931. 



114 Packed Heat from a New Type of Electric Steam Generator. Howard 

 Bidwell and Linus H. .lones. Indu.s. and Engin. Chcm. 23: March, 1931. 



115 Intensive Grassland Management. Kichard C. Foley. Amer. Soc. Anim. 

 Prod. Proc. 1930. 



