NO. 20 LETTUCE SEED GERMINATION — WEINTRAUB 7 



Acknowledgments. — The author is indebted to Dr. Oren Justice 

 and G. E. Nutile for samples of lettuce seed, to Dr. A. P. Swain of 

 the McNeil Laboratories, Inc., for parasorbic acid (8-hexenolactone), 

 to the Carbide and Carbon Chemicals Corporation for sorbic acid, to 

 R. W. Greeff Co., Inc., for melilotin, and to Miss Lorraine Arkin for 

 assistance with some of the experiments. 



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