70 MASS. EXPERIMENT STATION BULLETIN 441 



437 Plome Freezing in Massachusetts. By William B. Esselen, Jr., Kathei.ne 

 M. Lawler, and Carl R. Fellers. 27 pp. illus. October 1946. 



Home freezing of foods is arousing much interest. In Massachusetts 

 freezing seems best suited as a supplement to other methods of home food 

 preservation. Questions frequently asked by prospective home freezer 

 owners are answered. 



438 The Value of Limited Trapnesting to Poultry Breeding. By F. A. Hays. 

 24 pp. September 1946. 



Limited trapnesting reduces labor costs and affords a method by which 

 breeders may secure records on larger numbers of birds. Data reported in 

 this study indicate that safe estimates of complete performance may be 

 made from certain short-time records. 



439 Clearing and Improvement of Farm Land in Massachusetts. By Charles R. 

 Creek, Joseph F. Hauck, and Virgil L. Hurlburt. 31 pp. illus. July 1947. 



The primary purposes of this study have been to appraise the methods 

 used in farm land improvements, to examine the results in terms of cost- 

 benefit comparisons, and to study the significance of land reclamation for 

 the future of agriculture in Massachusetts. 



Control Bulletins 



128 Twenty-sixth Annual Report of PuUorum Disease Eradication in Massa- 

 chusetts. By the Poultry Disease Control Laboratory. 15 pp. June 1946. 



129 Inspection of Commercial Feedstuiifs. By Feed Control Service Staff. 28 

 pp. July 1946. 



130 Inspection of Commercial Fertilizers and Agricultural Lime Products. 

 By Fertilizer Control Service Staff. 27 pp. July 1946. 



131 Seed Inspection. By F. A. McLaughlin. 33 pp. December 1946. 



Meteorological Bulletins 



691-702, inclusive. Monthly reports giving daily weather records, together 

 with monthly and annual summaries. By C. I. Gunness, M. J. Markuson, 

 and F. J. Sievers. 4 pp. each. 



Reports of Investigations in Journals 



NUMBERED CONTRIBUTIONS 



525 Effect of institutional cooking methods on vitamin content of foods. II. 

 Ascorbic acid content of potatoes. By Anne W. Wertz and C. Edith Weir. 

 Food Res. 11 (4) :3 19-326. 1946. 



567 Composition of squashes after winter storage. Bv Arthur D. Holmes and 

 Albert F. Spelman. Food Res. 11 (4):345-350. 1946. 



571 Influence of purified lignin on nitrification in soil. By James E. Fuller. 

 Science 104 (2701):313-315. 1946. 



577 The vitamin content of canned and cooked fresh mushrooms. By Angela 

 M. Filios and William B. Esselen, Jr. Jour. Amer. Dietet. Assoc. 22 (9): 

 772-777. 1946. 



578 Nutritional status of women students. By Marie S. Gutowska and Evelyn 

 B. Films. Jour. Amer. Dietet. Assoc. 22 (9):763-765. 1946. 



