PLANT HYBRIDIZATION BEFORE MENDEL 



79 



in Spandau, and afterwards a celebrated physician in Berlin, he 

 was led to take up botanical studies as a relief from hypochron- 

 dria. It was thus that Sprengel became interested in the biology of 

 the flower, and hence finally, in 1793, published the results of 



X>M ^ 



W« 4 



\\\l ! 



vxy 



tMit(l(M'kf<" (M^luMuniils 



Plate XXIII. Title-page of Sprengel's "Das entdeckte Geheimniss der Natur." 



