96 BOTANY 



On separate aspects of Physiology further information will be found in AD. 

 MAYER, Agrikulturchemie, 5th edition, Heidelberg, 1901, 1902; HABERLAMT. 

 Physiologische Pflauzenanatomie, 2nd edition, Leipzig, 1896 ; SCHIMPER, Plant- 

 Geography, English edition, Oxford, 1903 ; HOMER, Physikal. Cheraie d. zelle u. 

 d. Gewebe, Leipzig, 1902 ; CZAPEK, Biochemie d. Pflanzen, Jena, 1905. 

 ( ! ) MEZ, Flora, xciv. 1905, includes literature. 



The law of VAN 'T HOFF, that the rapidity of a chemical reaction is about doubled 

 by raising the temperature 10", has also been verified for some physiological pheno- 

 mena. In the organism, however, there are usually anti-reactions which conceal 

 the primary dependence on the temperature, and give rise to the well-known 

 cardinal points with an optimum which is soon reached. Literature in revit-w l>y 

 JOST, Biol. Zentralbl. xxvi. 1906. 



According to BECQUEREL (Compt. rend. 140, 1905) dry seeds can withstand 

 without injury temperatures of - 190. 



On the geographical distribution of plants see SCHIMPEK, Plant-Geography, 

 Eng. ed. 1903. DRUDE, Handb. der Pfl.-Geogr. 1890. GRISEBACH, Veget. d. Erde, 

 1872. ENGLER, Versuch einer Entwicklungsgesch. d. Pflanzemvelt, Leipzig, 1879 

 and 1882. SOLMS-LAUBACH, Leitende Gesichtspunkte d. allg. Pfl.-Geogr. Leipzig, 

 1905. IHNE, Phanolog. Karte des Friihlingseinzugs in Mittelenropa. ; Peterni. 

 Mitt. 1905, Heft 5. HOCK, Ankbmmlinge in d. Pflanzenwelt ; Beihefte Bot. 

 Zentralbl. II. xviii. 1904. 



(-) ANDREWS, Jahrb. f. wiss. Bot. xxxviii. 1902. MOTTIER, Annals of Bot. 

 xiii. 1899. MIEHE, Flora, vol. Ixxxviii. 1901. FRUH, Abbildung d. vorherr- 

 schenden Winde durcli die Pflanzemvelt, Zurich, 1901-2. ( :! ) PFEFFER, Osmotische 

 Untersuchungen, 1877. DE VRIES, Jahrb. f. wiss. Bot., vol. xiv. ; ibid. vol. xvi. 

 Botan. Ztg. vol. xlvi. 1888, and vol. xlvii. 1889. ( 4 ) SI-HWEXDEXER, Das mech. 

 Prinzip im anatom. Ban der Monokotylen, 1879. ( 5 ) HABERLANDT, Physiolog. 

 Pflanzenanatomie, 2nd edition, 1896, p. 134 fF. TSCHIRCH, Flora, xciv. 1905. ( 6 ) 

 AMBROXN, Jahrb. fur wiss. Bot. vol. xii. 1879. ( 7 ) F. Sen WAR/, Phys. Unters. lib. 

 Dickenwachst. u. Holzqual. von Piuus silv., Berlin, 1899. HARTIG, Holzunter- 

 suchungeu, Berlin, 1901. WIEDERSHEIM, ibid, xxxviii. 1903. 0. MELVILLE 

 BALL, Jahrb. f. wiss. Bot. xxxix. 1903. VOCHTING, Nachr. Kgl. Ges. d. Wissensch. 

 Gottingen M. N. Kl. 1902, Heft 5. URSPRUNG, Ber. dtsch. Bot. Ges. 1901. 

 SONNTAG, Jahrb. fur wiss. Bot. xxxix. 1903. HARTIG, Holzuntersuch., Berlin, 

 1901, p. 53. WILDT, Inaug.-Diss., Bonn, 1906. ( 8 ) NOLL, Thiel's Landw. Jahrb. 

 vol. xxix. 1900, p. 361. ( 9 ) NAGELI, Denkschr., schweiz. Naturf. -Ges. vol. xxxiii. 

 1893. MOORE and KELLERMANN, U.S. Dep. of Agricult. 190">. MA-AYASU KANDA, 

 Journ. Coll. of Sc. Tokyo, vol. xix. (Review, SORAUER, Ztschr. f. Pfl.-Krankh. 

 15.) ( 10 ) WINOGRADSKY, Ann. de 1'Inst. Pasteur, 1890, 1891. Arch. d. sc. biol. 

 Inst. imp. d. Med. exper. a St. -Petersb. 1892. Zentralbl. f. Bakteriol. 1896. 

 STUTZER, Mitteil. d. Landw. Instituts d. Univ., Breslau, 1898. BEHREXS, Arbt. 

 d. Bakt. im Boden, etc. Arb. deutsch. Landw. Gesell. 1901, Heft 64. LOHXIS, 

 Zentralbl. f. Bakt. II. xiii. 1904. BEXECKE and KEUTXER, Ber. dtsch. Bot. Ges. 

 xxi. 1903. KEUTNER, Wiss. Meeresuntersuch. vol. viii. Kiel, 1904. (") Literature 

 in : A. FISCHER, Vorles. liber Bakterien, 2nd edition, Jena, 1903, and in HILTNKK in 

 LAFARS, Handb. d. technischen Mykologie, 2nd edition, vol. iii. BENECKK and 

 KKUTXER, Ber. dtsch. Bot. Ges. 1903, xxi. REIXKK, Ber. dtsch. Bot. Ges. xxi. 

 1903, and xxii. 1904. ( 12 ) SAIDA, Ber. dtsch. Bot. Ges. 1901, xx. J. KUHN, 

 Fiihlings Landw. Ztg. 1901, p. 1. WAUMBOLDT, Unters. iiber d. Biol. stickstoff- 

 bind. Bakterien. Inaug.-Diss., Gottingen, 1905. HASELHOFF and BREDEMAXN, 

 Landwirtschaftliche Jahrbiicher, xxxv. 1906. ( 13 ) BENECKE, Bot. Ztg. 1903, i. 



