40 



carbon dioxide and depletion in oxygen has been found by 

 Bender in the inner air of apples. 1 The data of the com- 

 position of the inner air of wood, leaves and other sub- 

 aerial parts i» conflicting, 2 Sometimes it is enriched 

 in oxygen, sometimes in carbon dioxide. This is to be 

 expected, since the composition of this inner air will 

 depend upon the balance between respiration and photo- 



n Ber. chem. Ges. 8: 112 (1875). 



2. Ingenhousz,- Versuche mit Pflanzen, vol. 2_, 

 p. 58 (1788); Saussure,- Ann. chim. phys. 19: I 50 (1821); 

 Calvert and Ferrand,- Ann. sci. nat. (3) 3: 377 (1844); 

 Gardner,- Froriep's neue Notizen 39 : 323 (1846); Schulze,- 

 Lehrb. Chem. f. Landw., vol. 1, p. 58 (1853); Erdmann,- 

 Jahresber. Chem. 1855 : 727; Baudrimont,- C. R. 41: 178 

 (1855); Martin, 0. R. 62_: 737 (1866); Faivre and Dupre,- 

 Ann. sci. nat. (5) 6_: 366 (1866); Barthelemy,- Ann. sci. 

 nay. (5) 19: 167 (1874); Saintpierre and Magnien,- C. R. 

 83; 490 (1876); Boehm,- Landw. Vers. Stat. 21: 373 (1878); 

 Joulin,- Bot. Centbl. 5: 102 (1881); Grehoult and Peyrou,- 

 C. R. 100: 1475 (1885); Peyrou,- C. R. 101; 1023 (1885), 

 Bot. Centbl. 45: 217 (1891); Kruticki,- Bot. Centbl. 39: 

 30 (1889); Devaux,- Ann. sci. nat. (7) 14: 297 (1891); 

 Aubert,- Rev. gen. Bot. 4: 275 (1892). 



