CT. 



T 



y 



\ 



-I. 



1 A 



rr 



n 



-^^tli 



appends 





PP^^^ed at t-^^ 



^^ gelati 



iiioiis 



•vity. 



fhape cb 



) 



an^ed 



e 



cavity waj 

 ous, but there 



vas quite 



rane j after this , 



yht green, and 

 ►ortions, which 



ttachedtotk 

 erceived. 

 eds exiftintlie 



a 



3 



emaiii 



>r 



for force 

 tried in them. 

 thin the cavity 

 • time proves 



to 



feed con 



fids of 



thin nae 



tnbraiif) 



I 



zani s 



Dlfferta- 



[10 



-egg 



bferve^ 



) 



ao 



I 



n 



IS 





VII 



REPRODUCTION 



5 



/ 



but that after impre 



thcf^ 



11 



radually become Imper 



Th 



nd obliterated ; and that new ones are produced from the fet 

 and difperfed into the yolk. Haller's Phyfiol. Tom. VIII. p. 94. 

 young feed after fecundation I fuppofe is nourifhed in a fimilar mai 

 ner fr^om the gelatinous liquor, which is previoufly depofited for th 



c 



\ 



purpofe ; the'uterus of the plant producing or fecretm^ 



fervoir or am 



which th 



bryon 



lodged 



d that the 



young embryon is furnlfl-ied 



th veffels to abforb a part of 



the very early flate of the embryon in the egg. 



Another curious analogy feems to exift between the embry 



Th 



the feed and of the egg in their mode of fufpenfion. 

 of the eo-g refls on the yolk, which is fufpended by two points, called 

 chalazae, fomewhat above its center of gravity i whence, however the 



moved, this embryon is always kept upwards, probably the 



Th 



tETS" IS 



better to receive the warmth of the mother during mcubation. 1 he 

 feed-enibryon feems to be fupported in the fam^ manner by the above 

 relation of Spallanzani by two points, and may thus receive a greater 

 warmth from the fummer fun. 



V 



2. The feeds are thus produced in their unimpregnated ftate in the 

 vecretable uterus, and nourifhed by the flower-bud, which was formed 

 in the deciduous trees of this climate during the preceding fummer, 

 and which now puts forth the brakes, or floral-leaves, for the oxy- 

 erenation of its blood ; and protrudes its roots and abforbents into the 

 •o-round from the lower part of its caudex, for the purpofe of acquir- 

 ing nourilhment : and on the fummit of this fexual apparatus are at 



the fame time produced the corol and nedaries of the flower, with the 

 flamens, and ftigmas, which are evidently defigned to give fecunda- 

 tion to the vegetable feeds, or eggs, previoufly depofited in the peri- 



or uterus : becaufe, as foon as thefe are impregnated, the corol 



carp 



and ne£laries, with the fl:amens, and fliigmas, fall off and difappear. 



The anthers have been proved by many experiments to be neccf- 

 fary to the fecundation of the vegetable feeds by the farina, or dufl;^ 



P which 



