670 Warington .— 7 lie Effect of Bovic /lad aud borctx on 
was the most detected in the barley seed or in the diied shoot? of untreated 
barley grown in water culture. 
8 . The function of boron in the case of the broad bean appears to be 
probably nutritive rather than catalytic, since a supply is required through¬ 
out the life of the plant. A parallel is drawn between the action of boron 
on plants and the vitamines on animal life. 
In conclusion, I wish to express my thanks to Dr. W. K. Brenchley for 
her ready advice and helpful suggestions throughout this investigation. 
I am also indebted to Professor Biffen, Mr. Martin Sutton, and Captain 
Hunter for the supply of seeds used in the experimental work. 
IV. Bibliography . * 1 
I . Agulhon, H. («) ( 1910 ) : Recherches sur la presence et le role du bore chez les vegetaux. 
These. Paris. 
__ (ti) ( 1910 ) : Emploi du bore comme engrais catalytique. Compt. Rend. Acad. Sci. 
Paris, 150, No. 5, pp. 288-91. 
--- (c) ( 1910 ) : Accoutumance du mais au bore. Ibid., 151, No. 26, pp. 1382-3. 
-- {d) ( 1912 ) : Emploi du bore comme engrais catalytique. Eighth Inter. Cong. 
Applied Chem. (Washington and New York), 15th sect., vii, p. 9. 
2 Andronescu, D. ( 1919 ): Germination and Further Development of the Embryo of Zea Mais 
separated from the Endosperm. Amer. Journ. Bot., vi, p. 443. 
3 . Archangeli, G. ( 1885 ): Sopra l’azione dell’ acido borico sul germogliamento dei semi. 
Processi verbali Soc. Toscana Sci. Nat., Pisa, v, p. 25. 
4. Bertrand, G. (a) ( 1911 ): Les engrais catalytiques et la culture de la betterave. Rev. Sci., 
Faris, 49, No. 22, p. 673. 
- (b) ( 1912 ) : Sur le role des infiniment petits produits chimiques en agriculture. 
Conf. 8 e Congres Inter. Chim. App. (New York, 1912); also in Rev. Sci., Paris, Jan. 18, 
I 9 I 3 * 
5 . Bertrand, G , and Thomas, P.: Practical Biological Chemistry, p. 16. G. Bell and Sons. 
6. Blair, A. W. ( 1920 ) : Borax Fertilizer Experiments, showing Striking Results. Ref. in Exp. 
Sta. Rec., vol. xliv, no. 5, p. 423. 
7 . Blair, A. W., and Brown, B. E. ( 1921 ) : The Influence of Fertilizers containing Borax on the 
Yield of Potatoes and Corn. Soil Science, vol. xi, p. 369. 
8. Blackwell, C. P., and Collins, C. H. ( 1920 ) : Trona Potash ; a Progress Report. S. Caro¬ 
lina Agr. Exp. Sta. Bull., 202. 
9 . Bonnet, C. ( 1754 ) : Recherches sur l’usage des feuilles dans les plantes et sur quelques autres 
sujets relatifs a l’histoire de la vegetation. Gottingen and Leyden. 
10 . Brkckenridge, J. E. ( 1921 ) : Boron in Relation to the Fertilizer Industry. Journ. Indus, and 
Engin. Chem., 13, No. 4, pp. 324-5. 
II . Brenchley, W. E. (a) ( 1914 ) : On the Action of certain Compounds of Zinc, Arsenic, and 
Boron on the Growth of Plants. Ann. Bot., vol. xxviii, pp 283-301. 
- (b) ( 1914 ): Inorganic Plant Poisons and Stimulants. Cambridge Univ. 
1 A few papers are included which are not referred to in the text. 
Press. 
