43© GENERATION. Sect. XXXIX. 10. u 



and each of them having a perfect nail. When he was about 

 three years old, I was de fired to take off the leffer one ; which I 

 did, but to my great aitonifhment it grew again, and along with 

 it the nail. The family afterwards went to refide in London, 

 when the father (hewed it to Mr. Bromfield ; who Hud, that he 

 fuppofed Mr. White, from fear of damaging the joint had not 

 taken it wholly out, but that he would difTecr. it out entirely, 

 and that then it would not return. He accordingly executed 

 his plan, and turned the ball out of the focket. Notwithstand- 

 ing this it grew again, a frefh nail was formed, and the thumb 

 remains in this date." 



Recapitulation . 



X. On confidering the production of vegetable buds and 

 feeds, of fome infects, and of more perfect animals, the modes 

 of generation may be divided into folitary and fexual. 



i. The firfl confifts either in folitary lateral generation, as 

 in the reproduction of the buds or bulbs of vegetables, and of the 

 young of the polypus, and of the hydra flentorea, or of the foli- 

 tary internal generation, as of the aphis, vine-fretter, actinia, 

 fea-anemone, tenia, tape-worm, and the volvox ; all which are 

 properly a viviparous progeny, as they are not preceded by feeds, 

 or fpawn, or eggs. 



In thefe modes of reproduction I fuppofe, that fibrils with 

 formative appetencies, and molecules with formative aptitudes 

 or propenfities, produced by, or detached from, various efTential 

 parts of their refpective fyftems, float in the vegetable or infect 

 blood. Thefe may be termed animalized particles of primary 

 combination, confifling of a folid particle adjoined to a peculiar 

 appetency or propenfity \ which latter may be efteemed its ethe- 

 real part, as magnetifm or electricity may be added to iron or to 

 other inanimate bodies. 



Thefe fibrils with formative appetencies, and molecules with 

 formative aptitudes or propenfities, cannot unite, or continue 

 united, in the circulating blood, as they are not at reft ; and 

 would be too large to pafs the capillaries of the aorta, pulmo- 

 nary artery, and glands, if they could be united in the larger 

 veflels ; they are therefore felected or fecrcted feparately by 

 adapted glands, and when mixed together combine, and form 

 the primary parts of the new organization of an embryon. 



Thofe fecreted from the long caudex of vegetable buds are 

 depofited beneath the cuticle of the bark of trees, and there 

 uniting form a new caudex gemmae along the fide of the parent 

 one j which has the property of producing fecondary organiza- 

 tions 



