RED PIGMENT OF FLOWERING PLANTS. 421 



adaptive significance can be established we have to do 

 with a reversion to "primitive red". 



The net result, to which an inquiry such as that re- 

 counted in this review leads, seems to be the exceedingly 

 trite one summed up in the great surgeon's dictum, " Don't 

 think, try ! " that it is superlatively necessary in such 

 biological problems as that proposed by this anthocyan to 

 attack by actual experiment : that explanations as ready as 

 they are rough, the formulation of which tends to become 

 a pernicious habit, only obscure the true issues con- 

 cerned. 



Biology, in its modern sense, is the subtlest Physiology, 

 dealing with refinements of fundamental processes, and 

 must if it is to join in the procession of truth, follow in 

 the wake of Physiology and "stand upon the order of its 

 going ". 



BIBLIOGRAPHY. 



(i) BONGARD. Bh//. de la soc. micr. de Paris, xxvii., p. 442. 



(2) ZiMMERMANN, Bot. Microtechnique (Eng. Trans.), p. 107. 



(3) Krukenberg. Grundziige einer Vergleichenden Physiologie 



der Farbstoffe und der Far ben, p. 106. 



(4) Hansen, A. Die Farbstoffe der BUiten u. Frlichte. Vcrh. 



d. PJiysik-Med. Gesellschaft z. Wilrzbnrg, N.F., Bd., xviii., 



7. 



(5) MULLER, N. J. C. JahrbiLcher f. WissenschaftlicJie Bot., xx.,, 



1889. 



(6) Hansen. See Krukenberg, loc cit. 



(7) WiGAND. B.Z., 1862, p. 121. 



(8) Detmer. Pflanz. Physiologie, p. 22. 



(9) Pfeffer. Pflanz. Physiologie, i., p. 306. 



(10) K u TSC H er. Ueber die Verwendung der Gerbsdiire in Stoffwech- 



sel der Pflanze, p. 10. 



(11) Pick. Ueber die Bedeutiing des rothen Farbestoffes bei den 



Phanerogamen und die Beziehungen desselben zur Stdrke- 

 wanderung, B.C. xvi., 1883. 



