154 AGRONOMY [Box. Absts., Vol. V, 



1113. Brown, Edgar. Voluntary labeling by seedsmen. Proc. Assoc. Official Seed Ana- 

 lysts 1919: 41^12. 1919. — Following a suggestion made by the Department of Agriculture, 

 many large seed houses and firms pledged their support to the proposal that seedsmen label 

 all farm seeds sold, giving on each lot of 10 pounds or more, purity, germination, and date 

 when tested, and if imported, the country of origin. A series of purchases of seeds from seed 

 dealers throughout the country showed that 78 per cent of the samples were not labeled, 

 however, "a larger percentage of the seedsmen who specifically agreed to label their seeds 

 were found to comply with the agreement than was the case with seedsmen who did not so 

 express themselves." — M. T. Munn. 



1114. Brown, W. H. Philippine fiber plants. Forestry Bur. Philippine Islands Bull. 19. 

 115 p., 28 pi. 1919.— See Bot. Absts. 5, Entry 1304. 



1115. Brunol, Gil Morice. Algunos pastos naturales de Mexico. [Natural pastures in 

 Mexico.] Rev. Agric. [Mexico] 4 : 58-62. 1 fig. 1919. — Outlines the different types of pasture 

 grasses in Mexico. — John A. Stevens. 



1116. Burgess, J. L. Relation of varying degrees of heat to the viability of seeds. Proc. 

 Assoc. Official Seed Analysts 1919: 48-51. 1919. — The author conducted experiments with 

 corn, wheat, oats, rye, cowpeas, soy beans, and garden beans — seeds most liable to injury 

 by insect pests, with a view of ascertaining the critical temperature above which the viability 

 of each species is affected. The results of the experiments are given in tabular form. — 

 M. T. Munn. 



1117. Call, L. E. Director's report. Kansas Agric. Exp. Sta. 1917-18. 63 p. 1918.— 

 See Bot. Absts. 5, Entries 1466, 2024. 



1118. Chambliss, Charles E. Prairie rice culture in the United States. U. S. Dept. 

 Agric. Farmers Bull. 1092. 26 p., 13 fig. 1920. 



1119. Clayton, W. F. The tea industry in South Africa. I. South African Jour. 

 Indust. 3: 112-120. PI. 1-2. 1920.— Brief history of the tea industry in Natal, and of the 

 cultural methods employed. — E. M. Doidge. 



1120. Cockayne, L. An economic investigation of the Montane tussock grassland of New 

 Zealand. New Zealand Jour. Agric. 19: 343-346. 2 fig. 1919.— This is the fourth of a series 

 of articles dealing with the Montane tussock grassland. The California thistle, C'nicus 

 arvensis, is reported as becoming firmly established in some areas which were bare from over- 

 grazing. It seems to be palatable to some animals, and may help to establish other useful 

 plants, in which case it should not be considered a weed. — N. J. Giddings. 



1121. Cowgill, H. B. Cross pollination of sugar cane. Jour. Dept. Agric. and Labor 

 Porto Rico 3 : 1-5. 1919.— See Bot .Absts. 5, Entry 1478. 



1122. Crevost, C, and C. Lemarie. Plantes etproduits filamenteuxet textiles del'Indo- 

 chine. [Fiber- and textile-producing plants of Indo-China.] Bull. Econ. Indochine 22: 813- 

 837. PI. 2. 1919. — A continuation of the general paper on this subject, covering the 

 families Asdepiadaceae, Ulmaceae, Urtricaceae, Scitamineae, Bromeliaceae, Amaryllidaceae, 

 Liliaceae, and Pontederiaceae. — E. D. Merrill. 



1123. Crocker, William. Optimum temperatures for the after-ripening of seeds. Proc. 

 Assoc. Official Seed Analysts 1919 : 46-48. 1919. — The author made a study of freshly harvested 

 seeds of species of Crataegus, American linden, sugar maple, peach, and two species of 

 Ambrosia. These seeds are typical of those having dormant embryos. The changes that go 

 on and lead up to their normal germination are spoken of as after-ripening of the embryos. 

 The embryos of these seeds must go through certain fundamental physiological changes 

 before they sprout normally, since the embryos will not grow at all or only abnormally when 



