Reproduction. 33 



glands, which acquire from the vegetable blood, and deposite beneath 

 the cuticle of the tree two kinds of formative organic matter, which 

 unite and form parts of the new vegetable embryon; which again 

 uniting with other such organizations form the caudex, or the plu- 

 mula, or the radicle, of a new vegetable bud. 



A similar mode 1 of reproduction by the secretion of two kinds of 

 organic particles from the blood, and by depositing them either inter- 

 nally as in the vernal and summer aphis or volvox, or externally as in 

 the polypus and taenia, pi'obably obtains in those animals; which are 

 thence propagated by the father only, not requiring a cradle, or nutri- 

 ment, or oxygenation from a mother; and that the five generations, 

 said to be seen in the transparent volvox globator within each other, 

 are perhaps the successive progeny to be delivered at different 

 periods of time from the father, and erroneously supposed to be 

 mothers impregnated before their nativity. 



II. Sexual as well as solitary reproduction appears to be effected 

 by two kinds of glands; one of which collects or secretes from the 

 blood formative organic particles with appetencies to unite, and the 

 other formative organic particles with propensities to be united. 

 These probably undergo some change by a kind of digestion in their 

 respective glands; but could not otherwise unite previously in the 

 mass of blood from its perpetual motion. 



The first mode of sexual reproduction seems to have been by the 

 formation of males into hermaphrodites; that is, when the numerous 

 formative glands, which existed in the caudex of the bud of a tree, 

 or on the surface of a polypus, became so united as to form but two 

 glands; which might then be called male and female organs. But 

 they still collect and secrete their adapted particles from the same 

 mass of blood as in snails and dew-worms, but do not seem to be so 

 placed as to produce an embryon by the mixture of their secreted 

 fluids, but to require the mutual assistance of two hermaphrodites for 

 that purpose. 



From this view of the subject, it would appear that vegetables and 

 animals were at first propagated by solitary generation, and afterwards 

 by hermaphrodite sexual generation ; because most vegetables possess 

 at this day both male and female organs in the same flower, which 



