THE METABOLISM OF PLANTS. 285 



ture. It appears, further, at least as far as high temperatures 

 are concerned, that some organs which are saturated with 

 water are more tolerant than others. Soaked seeds, for in- 

 stance, can endure exposure to higher -temperatures than can 

 stems, leaves, or roots. 



BIBLIOGRAPHY. 



Light. 



Boussingault ; Comptes rendus, LVIII, 1864. 



Agronomic, IV, 1868. 



Sachs ; Experimental Physiologic, p. 21. 

 Draper "\ 

 Pfeffer 



Lommel \ ; see Bibliography of Lecture ix. 

 Tirniriaseff I 

 Engelmann j 



Engelmann ; Pfliiger's Archiv, XXVI. 

 Timiriaseff ; Comptes rendus, xcvi, 1883. 

 Sachs ; Text-book, 2nd English edition, p. 741. 

 Famintzin ; Ann. sci. nat., ser. 6, t. X, 1880. 

 Dehe'rain and Maquenne ; Ann. sci. nat., s6r. 6, t. IX, 1878. 

 Siemens ; Proc. Roy. Soc., 1880. 

 Rudolph Weber; Landw. Versuchsstat, xvm, 1875. 

 Mayer and von Wolkoff; Landw. Jahrb., in, 1874. 

 Pauchon ; Ann. sci. nat., seV. 6, t. X, 1880. 

 Cahours ; Comptes rendus, LVIII, 1864. 

 Drude; Biologic von Monotropa, Gottingen, 1873. 

 Detmer ; Jenaische Zeitschrift, 1881. 



Wilson; Flora, 1882 ; Amer. Journ. of Science, xxin, 1882. 

 Borodin ; Just's Jahresbericht, 1876. 

 Sachs ; Lotos, Prag, 1859. 



Wiesner; Enstehung des Chlorophylls, Wien, 1877. 

 Mikosch; Sitzber. d. k. Akad. in Wien, LXXXII, 1880. 

 Gardner; Phil. Mag., xxiv, 1844. 

 Guillemin ; Ann. sci. nat., sdr. 41. vil, 1857. 

 Sachs ; Experimental Physiologic, 1865, p. 15. 

 Wiesner ; loc. cit. 



Elfving; Arb. d. bot. Inst. in Wiirzburg, II, 1880. 

 Batalin; Bot. Zeitg., 1874. 



G. Haberlandt ; Sitzber. d. k. Akad. in Wien, LXXII, 1876. 

 Askenasy; Bot. Zeitg., 1875. 



