78 MASS. EXPERIMENT STATION BULLETIN 449 



614 Pre-emergence spraying for weed control in vegetables. By William H. 

 Lachman. Amer. Soc. Hort. Sci. Proc. 49:339-342. 1947. 



615 Development time from bloom to maturity in cultivated blueberries. By 

 J. S. Bailey. Amer. Soc. Hort. Sci. Proc. 49:193-195. 1947. 



617 Stability of reduced ascorbic acid in mares' milk. By Arthur D, Holmes 

 and Carleton P. Jones. Jour. Nutrition 34 (1):113-119. 1947. 



622 Testing quaternary ammonium sanitizers as used in the dairy industry. 

 By W. S. Mueller, D. B. Seeley, and E. P. Larkin. Soap and Sanitary 

 Chemicals for September 1947. 



623 Ascorbic acid content of hen's eggs. By G. H. Satterfield, T. A. Bell, F. W. 

 Cook, and Arthur D. Holmes. Jour. Amer. Dietet. Assoc. 23 (12):1052- 

 1054. 1947. 



624 Male sex hormones and artificial light as activators in the spermatogenesis 

 of adult males. II. By F. A. Hays. Poultry Sci. 27 (l):3-6. 1948. 



625 Vegetative propagation of kudzu. By W. L. Doran and A. B. Beaumont. 

 Jour. Amer. Soc. Agron. 39 (9):834-835. 1947. 



626 Plumage color genes in White Plymouth Rocks and White Wyandottes. 

 By F. P. Jeffrey. Poultry Sci. 26 (5):526-528. 1947. 



627 Antioxidants in vegetable oils. By John E. W. McConnell. Amer. Per- 

 fumer and Essential Oil Rev. 50(3):241-243; (4):346-349. 1947. 



631 Further studies on the use of calcium chloride to maintain firmness in 

 canned and frozen apples. By W. B. Esselen, Jr., W. J. Hart, Jr., and C. R. 

 Fellers. Fruit Prod. Jour, and Amer. Food Mfr. 27 (1):8-13. 1947. 



632 The freezing of swordfish. By Antonio Lopez-Matas and C. R. Fellers. 

 Quick Frozen Foods 10 (3):72-75. 1947. 



633 Thyroxine and artificial light as activators in the spermatogenesis of males. 

 By F. A. Hays. Poultry Sci. 27 (l):84-86. 1948. 



636 Permanency of synthetic ascorbic acid added to milk. By Arthur D. 

 Holmes and Carleton P. Jones. Jour. Dairy Sci. 31 (2):99-102. 1948. 



637 Viability and fertility in Rhode Island Red females. By F. A. Hays. 

 Poultry Sci. 27 (2):186-193. 1948. 



638 Extraction of copper from soil as affected by soluble components of oat 

 straw and alfalfa meal. By Charles Hurwitz. Soil Sci. 65 (3) :275-280. 1948. 



641 The value of the progeny test in males. By F. A. Hays. Amer. Nat. 

 81:454-460. 1947. 



643 Some studies using isopropyl n-phenyl carbamate as a selective herbicide. 

 By William H. Lachman. Amer. Soc. Hort. Sci. Proc. 51 :541-544. 1948. 



644 Some effects of blossom removal on vegetative development and defolia- 

 tion in determinate tomato plants. By William H. Lachman. Amer. 

 Soc. Hort. Sci. Proc. 51:341-345. 1948. 



645 Immunization of chickens against Newcastle disease. By H. Van Roekel, 

 F. G. Sperling, K. L. Bullis, and O. M. Olesiuk. Jour. Amer. Vet. Med. 

 Assoc. 112 (851):131-132. 1948. 



646 A Valsa associated with Cytospora canker of spruces. By David H. 

 Marsden. Phytopathology 38 (4) :307-308. 1948. 



648 Effect of different mulches upon the nutritive value of tomatoes. By 

 ArthurD. Holmes, C.Tyson Smith, Charles Rogers, and William H. Lachman. 

 Soil Sci. 65 (6):471-475. 1948. 



