190 METABOLISM 



JENSEN, Hj. 1898. Centrbl. Bakt. II, 4, 401. 



JOST. ^ 1895. Jahrb. f. wiss. Bot. 27, 403. 



KATZ. ' 1898. Jahrb. f. wiss. Bot. 31, 599. 



KOCH, L. 1880. Die Klee- u. Flachsseide. Heidelberg. 



KOCH, L. 1887. Entwicklungsgesch. d. Orobanchen. Heidelberg. 



KOCH, L. 1889. Jahrb. f. wiss. Bot. 20, i. 



KOCH, L. 1891. Ibid. 22, i. 



KOHNSTAMM. 1 90 1. Bot. Centrbl. (Beihefte) 10, 90. 



LABORDE. 1897. Annales Instit. Pasteur, n, i. 



LAURENT. 1889. Annales Instit. Pasteur, 3, 368. 



LAURENT. 1890. Koch's Jahresb. iiber Garungsorg. i, 54. 



LAURENT. 1898. Compt. rend. 127, 786. 



[LAURENT. 1904. Revue gen. de Bot. 16, 14.] 



MALFITANO. 1900. Annales Instit. Pasteur, 14, 60 and 240. 



MEISSNER, CURT. 1902. Akkommodationsf ahigkeit d. Schimmelpilze. Diss. Leipzig. 



MEISSNER, R. 1900. Centrbl. Bakt. II, 6. 



[MOLISCH. 1893. Sitzb. Wien. Akad. 102, I, 423.] 



NAGELI. 1879. Ernahrung d. nied. Pilze. Bot. Mitt. 3, 395. 



NAGELI. 1882. Unters. iiber nied. Pilze. Munich and Leipzig. 



NIKITINSKI. 1902. Jahrb. f. wiss. Bot. 37, 365. 



PASTEUR. 1858-60. Compt. rend. 46, 617 ; 51,298. 



PASTEUR. 1860. Annales Chim. et Phys. Ill, 58, 323. 



PASTEUR. 1862. Ibid. Ill, 64, 106. 



PEIRCE. 1894. Annals of Bot. 8, 53. 



PFEFFER. 1895. Jahrb. f. wiss. Bot. 28, 205. 



PFEFFER. 1896. Ber. Sachs. Gesell. Wiss. (Math. -phys. Cl.), 513. 



PITRA. 1 86 1. Bot. Ztg. 19, 53. 



[RACIBORSKI. 1905. Bull. Acad. de Cracovie, Math.-nat. Cl. 461.] 



RAULIN. 1869. Annal. Sc. nat. v, n, 91. 



REINITZER. 1900. Bot. Ztg. 58, 59. 



REINKE. 1883. Unters. aus d. bot. Labor. Gottingen, 3, 13. 



SANGUINETTI. 1897. Annal. Instit. Pasteur, n, 264. 



THIELE. 1896. Temperaturgrenzen d. Schimmelpilze (comp. Pfeffer, Phys. I, 373 . 



VINES. 1897-1902. Annals of Botany, n, 563 ; 12, 545 ; 15, 563 ; 16, i. 



WEHMER. 1895. Beitr. z. Kenntnis einh. Pilze, Jena, Heft u, p. 86 (Koch s 



Jahresbericht, 1895). 



WENT. 1901. Jahrb. f. wiss. Bot. 36, 6n (also Centrbl. Bakt. II, 8, 544). 

 WINOGRADSKY. 1899. Centrbl. Bakt. II, 5, 342. 

 WORTMANN. 1882. Zeitschr. f. physiol. Chemie, 6, 287. 

 ZUMSTEIN. 1899. Jahrb. f. wiss. Bot. 34, 149. 



LECTURE XVI 

 RESPIRATION 



So far we have been studying certain of the chemical processes which go on 

 in the plant from one point of view only ; we have dealt with the phenomena 

 of assimilation, i. e. the construction of complex compounds out of simple ones, of 

 organic substances out of inorganic, and also glanced at the alterations which 

 products of constructive metabolism undergo when they become reserves, plasta, 

 &c. ; but we drew special attention to the fact (p. 124) that another series of 

 processes took place in the plant which resulted once more in the formation of 

 simple bodies from complex. This statement we must now emphasize. Through- 

 out the entire plant and at all times what may be termed dissimilation is 

 going on a process which partly, at least, undoes what assimilation has done. 

 On examining a leaf which has been assimilating all day, but which has been 

 prevented from getting rid of the products of assimilation we find that it does 

 not contain at nightfall as much carbon in the organic form as we should expect 

 from the amount of carbon-dioxide decomposed, nor does the plant as a whole 



