24 Pltydological Pre-(1eter mi nation 



various chemical treatments of seeds, very little expeiimeiital work is on 

 record with regard to the subsequent growth and yield of the plants 

 produced from the treated seeds. All the available evidence, however, 

 supports the conclusion that where germination and early seedling growth 

 are stimulated by chemical treatments of the seed the subsequent growth 

 and final yield are favourably influenced in proportion. 



One of the most interesting outcomes of the present review of litera- 

 ture has been to emphasize the fact that normal plant-growth falls into 

 line with a " compound interest " law of development. The data obtained 

 by various workers from growth experiments with plants from seeds 

 which had been deprived of part of their original food-reserves show 

 that, broadly speaking, the growth and yield of the resulting plants are 

 proportional to their initial "food-capital," and thus provide an illumin- 

 ating demonstration of this "compound interest" law. 



BTBLTOGRAPHY. 



(1) Appel, 0. unci Gassner, ft. Der .schadliclu; Eiiiflus.s zu hoher Kcimungstem- 



peraturcn auf die spiitere Eiitwickluiig von Getreidcpttanzen. Mitteil. iiit.<i d. 

 Kais. Biolocj. And. cand Land- und Forstivirl.schafl, Heft 4, 1907, p. o. 



(2) Atterberg, a. Die Nachreife des Getreides. Landu: Ver.suchs-Sf. 67, 1907, 



p. 129. 



(3) Babcock, S. M. Metabolic Water: Its Production and Role in Vital Phenomena. 



Univ. of Wisconfsin Agric. Expt. Sta., Research Bull. No. 22, March, 1912. 



(4) BoKORNY, T. Ueber den Einfluss versehiedenei- Suhstanzen auf die Keiinung 



der Pflanzensamen : I, 11 and III. Biocheiii. Zeilscfir. oO, 19 1 .'5. 

 (o) Breal, E. Traitement Cuiva-ique des Semenees. ('. R. df rArnd. des Sr. Parish, 



142, 190G, p. 904. 

 {r>) et GiuSTiNiANi, E. 8ur un Xouveau Traitement des Semenees. C.R. de 



VAcad. des Sc. Paris, i:39, 1904, p. rnA. 



(7) Craig, J. Rpt. of the Horticulturist. Canada Expt Farms RpL, 1897. 



(8) Fischer, A. Wasserstolf- und Hydroxy lionen als Keimungsreize. Ber. d. 



Deulsch. Bot. Ges. 25, 1907, p. 108. 



(9) Gassner, G. Beobachtungen und Versuche iil)er den Anbau und die Entwick- 



lung von Getreidepflanzen im subtropisclien Klinia. ./afrresher. d. Vereiiiif/. 

 f. Am/ew. Bot. 8, 1910, p. 95. 



(10) — — Beitnige zur physiologischen Charakteristik sommer- und winter- 



annueller Gewaciise, inbesondere der Getreidepflanzen. Zeitsc/ir. fur Bot. 10, 

 1918, p. 417. 



(11) und Grimme, C. Beitriige zur Frage der Frostharte der Getreidepflanzen. 



Ber. d. Deulsch. Bot. des. 31, 1913, p. 507. 



(12) Goodspeei), T. H. Notes on the Germination of Tobacco Seed. I'uir. of 



California Fublicalions in Botany, v, No. 5, 1913, pp. 199-222. 



