140 ARE THE EFFECTS OF USE INHERITED? 



show that these free gemmules do not exist. Trans- 

 fusion of blood has failed to affect inheritance in 

 the slightest degree. Pangenesis, with its attraction 

 of gemmules from all parts of the body into the 

 germ-cells, and the free circulation of gemmules 

 in the offspring till they hit upon or are attracted 

 by the particular cell or cells, with which alone 

 they can readily unite, seems a less feasible theory 

 and less in conformity with the whole of the facts 

 than an hypothesis of germ-continuity which sup- 

 poses that the development of the germ-plasm 

 and of the successive self-dividing cells of the 

 body proceeds from within. Darwin's keen 

 analogy of the fertilization of plants by pollen 

 renders development from without conceivable, 

 but as there are no insects to convey gemmules to 

 their destination, each kind of gemmule would 

 have to be exceedingly numerous and easily at- 

 tracted from amongst an inconceivable number of 

 other gemmules. Arguments against pangenesis 



