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Richardson, A. H. (6236) 



gathering and extracting red pine seed. Jour. Forestry 23 : 304-310. 1925. 



(6237) 



seeds for future forests. Canad. Forest and Outdoors 22 (10) : 563-564, 



illus. 1926. 



Rose, R. C. (6238) 



after-ripening and germination of seeds of tllia, sambucus, and rubus. 

 Bot. Gaz. 67 : 281-308. 1919. 



Russell, G. A. (6239) 



effect of removing the pulp from camphor seed on germination and the 

 subsequent growth of the seedlings. Jour. Agr. Research 17 : 223-238, 

 illus. 1919. 



Salter, R. M., and MoIlvaine, T. G. (6240) 



effect of reaction of solution on germination of seeds and on growth of 

 seedlings. Jour. Agr. Research 19: 73-95. 1920. 



Sargent, C. S., Engelmann, G., and M[eehan], T[homas]. (6241) 



vitality of the seeds of pinus contorta ; vitality of the seeds of sero- 

 tinous cones ; and vitality of serotinous cones. Bot. Gaz. 5 : 54, 62-63, 

 75-76. 1880. 



Sohierbeck, Otto. (6242) 



importing tree seeds: a question. Canad. Forestry Mag. 17 (4) : 213-215. 

 1921. 



Show, S. B. (6243) 



methods of hastening germination. Jour. Forestry 15 : 1002-1006. 1917. 



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THE RELATION OF GERMINATION IN THE GREENHOUSE AND NURSERY. JoUT. For- 

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Siggins, H. W. (6245) 



TREE CROPS MAY BE WIND SOWN AT DISTANCE FROM THE SEED TREES. U. S. Dept. 



Agr. Yearbook 1928 : 586^587. 1929. 



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wind carry of forest tree seeds. Timberman 28 (3) : 191-192. 1927. 



Sterling, E. A. (6247) 



collecting jack pine seed. Forestry and Irrig. 9 : 27-32. 1903. 



Stone, G. E. (6248) 



INFLUENCE OF CHEMICAL SOLUTION UPON THE GERMINATION OF SEEDS. MaSS. 



Agr. Expt. Sta. Ann. Rept. 13 : 74-83. 1921. 



Stout, A. B. (6249) 



why are chestnuts self-fruitless? Jour. N. Y. Bot. Gard. 27: 154-158, 

 illus. 1926. 



Tashiro, Shiro. (6250) 



new method of determining vitality of seeds. 8th Internatl. Cong. Appl. 

 Chein. Original Communications 26 : 163. 1912. 



Taylor, F. W., and Prince, F. S. (6251) 



result of seed tests for 1915. N. H. Agr. Expt. Sta. Bull. 177, 19 pp. 1915. 



Thornber, J. J. (6252) 



some prattcal suggestions concerning seed testing. Ariz. Agr. Expt. Sta., 

 Timely Hints for Farmers, 55, 4 pp. 1905. 



Thrupp, A. C. (6253) 



scientific seed collection. Forestry Chron. 3 (2) : 17-24. 1927. 



Tlllotson, C. R. (6254) 



storage of coniferous tree seed. Jour. Agr. Research 22: 479-510, illus. 

 1922. 



Toumey, J. W. (6255) 



collection of longleaf pine seed in texas. Jour. Forestry 24: 728-729. 

 1926. 



