T 



Vll. 



3.1 



time fo 



ice 



mucii 



attend! 



will 



more 

 its fut 







not lie 

 paK 



O^^t 



ure 



2p' 



^-ftock,an(la 

 ppensr The 



oper abforbeiit 

 -he nonpareil- 



ardsconfiftsof 



udex defceiidi 

 crab-dock, 

 firft, becaiife 

 put forth budi 



e m 



feme 



ferted into a 

 ,es, the upper 

 > the diametef 

 the 1*5^'^^ 



Sat 



e 



kin^ 



aew 



circles ot 



.•hole len 



atbO 



D 



( 



ronn 

 con 



the upP^I 



.s reft> 



o: 







ntrs 



difti^^ 



^io^ 



tc 



Sect. VII. 3. 2, 



REPRODUCTION. 



121 



to a fexual mule. For as in thefe trees thus combined by ingraftment 



every bud has the upper parts of its caudex that of a golden pippin, 



the middle part of it that of a nonpareil, of the lower part of it tbdt 



of a crab ; if thefe caudexes, which conftitute the filaments of the 



bark, could be feparated intire from the tree with their plumules and 



radicles, they would exhibit fo many lateral or paternal mules, con- 



fiftino- of the connefled parts of their three parents ; the plumula be- 



lono-ino- to the upper parent, and the radicle to the lower one, and the 



triple caudex to them all. 



A reparation of thefe buds from the parent plant is faid to have been 

 obferved by Mr. Blumenback in the conferva fontinalis, a vegetable 

 which confifts of fmall fliort flender threads, which grow in our foun- 

 tains, and fix their roots in the mud. He obferved by magnifying 

 lafles, that the extremities of the threads fwell, and from fmall tu- 



o- 



bera, or heads, which gradually feparate from the parent threads, at- 

 tach themfelves to the ground, and become perfe(fl vegetables ; the 

 whole progrefs of their formation can be obferved in forty-eight 

 hours. Obfervations on Plants, by Von Uflar, Creech, Edinb. 



2. The lateral propagation of the polypus found in our ditches in 

 July, but more particularly that of the hydra ftentorea, is wonder- 

 fully analagous to the above idea of the lateral generation of vegeta- 

 bles. The hydra flentorea, according to the account of monfieur 

 Trembley, multiplies itfelf by fplitting lengthwife; and in twenty- 

 four hours thefe divifions, which adhere to a common pedicle, refplit, 

 and form four diftin(^ animals. Thefe four in an equal time fplit 



and thus double their number daily, till they acquire a figure 



again 



fomewhat refembling a nofegay. The young animals afterwards fe- 

 parate from the parent, attach themfelves to aquatic plants, and crive 

 rife to new colonies. 



Another curious animal fa6l is related by Blumenback in his treatife 

 on generation, concerning the frefli water polypus. He cut two of 

 them in half, which were of different colours, and applying the upper 



R 



part 



