MAKIXG yEW KiyPS or PLAXrS 4.1.) 



peeted. and furthermore raise the important question 

 whether we can control evolution and so produce 

 specie? at will. Some experiments already made in 

 this direction are very encouraging and open up a 

 promising field of research. ^ 



•In rci'ar.l to ihi- wurk of Proi\---or de Vrie-. consult: de Vries, "On the 

 Origin of ^x^ih-^." Popular >'•■/.? Moiilluy, April, 190.S: "My Primrose 

 Experiments." [mh ptiidtnt, >ei>r. 2."i. 1902: "Ou Hybridization." in Bailey'^ 

 "Plant-Breediiitr ' third edition, 1904, p. U;t. AUo Hnbrecht. "Hugo de Vrie-' 

 Theorv of Mutations." P'tpular Scitnct Monthly, July. 1904; MacDougal: 

 "Professor de Vries' Experiments on the Orii^in of S]'eci>i^^." Iiidepend>rnt, 

 S.].!. 25. 1902: Lyle. "Plant-Making in .» Dutch Garden," Sierybody's 

 Magasiiie for June. 1902; MacDougal: "Mutation In Plants," Ameriean 

 XaturaUst for 1903. 



