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HILLMAN, F. H.: Dodder in Relation to Farm Seeds. Farmers' Bulletin 306, 1907; 

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HUGHES, H. D.: The Germination Test of Seed Corn. Bulletin 135, Agricultural Ex- 

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MCCARTHY, GERALD: Seed Testing, Its Uses and Methods. Bulletin 108, North 

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XOBBE, DR. FRIEDRICH: Handbuch der Samenkunde Physiologische Statitische 

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PIETERS, A. J.: The Farmer's Interest in Good Seed. Farmers' Bulletin in, 1900; 

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ROBBINS, W. W. : Colorado Seed Laboratory. Bulletin, Vol. i, No. i, The Colorado Seed 

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SASSCER, E. R. and HAWKINS, Lou A.: A Method of Fumigating Seed. Bulletin 186, 

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SCHMITZ, NICOLAS: The Germination Test of Seed Corn. Extension Circular 71, 

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STONE, GEORGE E.: Seed Separation and Germination. Bulletin 121, Massachusetts 

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TRUE, A. C.: Rules and Apparatus for Seed Testing. Circular 34 (revised), Office 

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WEED, CLARENCE MOORES: Seed-travellers. Studies of the Methods of Dispersal of 

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