New YorK AGRICULTURAL EXPERIMENT STATION. 385 
Cuurcu, Practice with Science. London, 1865, p. 107. Cited 
by Wollny, p. 157. 
Dierricu, TH., Erster Bericht ueber einige Arbeiten der agr. 
chem. Vers-Stat. in Heidau. Hassel, 1862, 1848. Cited by Wollny, 
p. 156. 
GranpEAu, L. Influence du poids du grain de semence sur le 
rendement des cereales. Journ. Agr. Prat., 1898, p. 627. Abst. 
in Bied. Centbl., 1899, p. 485. 
v. GREVENITZ. (Determinations of specific gravities of various 
seeds.) Vers. Deutscher Naturf. u. Aertze zu Heidelberg, 1829. 
Isis von Oken, 1830. Cited by Nobbe, p. 315. 
Haperuanpr, F. (Favorable report on seed selection according ~ 
to specific gravity.) Boehm, Centbl. fuer die ges. Landeskultur. 
1866, p. 4. Cited by Wollny, p. 156, and Nobbe, p. 313. 
HaAkENiLemn, H. (Determinations of specific gravities of several 
kinds of seeds.) Landw. Vers. Stat., 1877, p. 171. Abst. in Bied. 
Centbl., 1878, p. 311. 
Harz, C. O. Samenkunde. 
Hewtiriecet, H. (Favorable report on seed selection according 
to specific gravity.) 2. Jahresber. der Vers.-Stat. Dahme, 1859, 
pott Cited by Wollny, p:L56. 
(Effect of specific gravity of seed on yield of 
plant.) Beitrsege zu den naturwissenschaftlichen. Grundalagen 
des Ackerbaues. Braunschweig, 1883, pp. 39-117. Abst. in Bied. 
Centbl., 1883, p. 530. 
HorrMaN, Ros. (Determinations of specific gravities of various 
seeds.) Landw. Vers.-Stat., 1863, p. 189. Cited by Nobbe, p. 315. 
Kopayasul, C. On the selection of rape seed. Imp. Univ. Col. 
Agr. (Tokyo) Bul., Vol. 3, p. 440. Abst. in Hxpt. Sta. Record, 
Vol. 10, p. 1047. ; 
Lyon, T. L. The adaptation and improvement of winter wheat. 
Nebr. Expt. Sta. Bul. 72 (1902), p. 19. 
Marek, G. Das Saatgut und dessen Hinfluss auf Menge und 
Guete der Ernte. Vienna, 1875. Cited by Wollny, p. 247. 
Mueuier, A. (A method of determining the specific gravity 
of seeds.) Journ. fuer Landw., 1855, p. 91. Cited by Wollny, 
p. 248. 
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