1885.] APPENDIX. 51 



electrical batteries. The juices thus obtained, free of all germs, in no 

 case produced disease when inoculated into healthy tissues. The 

 proof was therefore absolute that the germs only were the cause of the 

 pear blight. 



It was now necessary to show whether any kind of germs would 

 cause blight, or whether there is but one specific kind. For this pur- 

 pose inoculations were made in pear-trees as before, using the germs 

 from rotting tomatoes, from various kinds of decay, etc. In no case 

 was there any disease produced. Several questions were asked the 

 professor which received immediate and intelligent answers. 



APPENDIX B. 



Abstract from paper on " The Influence of Pollen," by A. J, 

 Fuller of New Jersey : 



In 1859 I commenced to raise strawberries from seed, partly for 

 the purpose of producing new varieties, but principally to test certain 

 theories then frequently discussed relative to the value of the pistillate 

 varieties. The late Wm. K. Prince of Flushing, N. Y., claimed that 

 the pistillates were and ever continued to be the most productive 

 owing to their unisexual character. This theory was certainly a very 

 plausible one, but unfortunately it did not hold good when tested in 

 the field and basket. In conducting ray experiments during the year 

 named and several succeeding ones I cultivated some of the most 

 noted of the pistillate and staminate varieties known at that time. 

 Among the former I may mention Hovey's Seedling and Prince's 

 Scarlet Magnate. The latter was quite a large variety, being very 

 regular in form, nearly globular or slightly compressed, bright scarlet, 

 flesh white, firm, not high flavored, but good. The Hovey is so much 

 better known that I need not refer to its peculiar characteristics. 



In cultivating these and other pistillate varieties I employed various 

 starainates to supply the necessary pollen for fertilization. When I 

 used the Boston Pine, a staminate variety, also raised by Mr. C. M. 

 Hovey, to fertilize the flowers of the Scarlet Magnate and Hovey's 

 Seedling, I was unable to see that the pollen had any marked influence 

 upon the size or color of the berries, probably owing to close relation- 

 ship and great similarity of color and form of all three varieties ; 

 although at the time I imagined, even if it was not really a fact, that 

 the Hovey was less acid when the flowers were supplied with pollen 

 from the Boston Pine than from such very acid varieties as the 



