416 



THE AMERICAN NATURALIST [Vol. XL VII 



mous in comparison with that of the compounds of 

 copper. 



It thus holds, in agreement with Driesch, that any 

 "static" doctrine, in which admittedly the perceptual 

 conditions determine what happens in the living system, 

 does not make a difference in principle between the laws 

 of the living and those of the non-living; but that to make 

 such a difference, it must be held that the same condi- 

 tions may act diversely in the two fields ; thus giving rise 

 to experimental indeterminism (and perhaps to the as- 

 sumption of a non-perceptual factor for determining the 

 diversities not otherwise accounted for, as in the vital- 

 ism of Driesch). But it holds (I take it with Lovejoy, 

 Glaser, Woodruff, Spaulding, Sumner and perhaps 

 most investigators) that we do not have grounds for 

 supposing that such a condition exists; and that even 

 DriesciVs presentation results in the non-existence of 

 any actual cases of experimental indeterminism. 



BOOKS AND PAPEES REFERRED TO 



Balfour, A. J. 



1879. A Defence of Philosophic Doubt. 

 Bergson, H. 



1911. Creative Evolution. 407 pp. New York. 



1901. Mechanismus tmd Vitalismus. 107 pp. Leipzig. 



1893. Die Biologie als selbstandige Grundwissenschaft. 61 pp. 



Leipzig. 



1894. Analytische Theorie der organisehen Entwickelung. Leipzig. 

 1896. Die Maschinentheorie des Lebens. Biol. Centralblatt, Bd. 16, 



pp. 353-371. 



1899. Die Lokalisation morphogenetischer Vorgdnge. Ein Bevveia 

 vitalistischen Geschehens. 82 pp. Leipzig. (Also, Arch. f. 

 Entw.-mech., Bd. 8, pp. 35-111.) 



