>56 EXPERIMENTAL EVOLUTION LECT. 



the same or a different form. And finally comes that 

 much-discussed question of the heredity of muti- 

 lations, negatively settled by Weismann, but which 

 certainly requires much new investigation. On 

 hybridism, sexuality, and many other points, useful 

 facts will be discovered ; in fact, as has been said, 

 we cannot exactly foresee the subjects which will 

 naturally offer themselves to our investigation. 



But there is enough to be done, even if experiment 

 were to suggest nothing new, and the field which is 

 opened to experiment, in the lines briefly indicated 

 above, in the line of the investigation of organic 

 evolution in its general sense, and in its details, is 

 simply unlimited. 



All these experiments can be made on any animals 

 and plants, and in any country. What is required 

 for their execution is an institution of some sort 

 specially devoted to this line of investigation. It 

 appears to me that this institution should comprise 

 the following essential elements : rather extensive 

 grounds, a farm with men experienced in breeding, 

 agriculture, and horticulture, some greenhouses, and 

 a laboratory with the common appliances of che- 

 mistry, physiology, and histology. Of course this 

 must be located in the country. It is very important 

 to have experienced farm-hands, and a good chemist 

 and histologist are necessary in the staff of the insti- 



