PHYSIOLOGY. Bod 
All the anthers of Hibiscus syriacus contained 
4863 globules of pollen, 50 or 60 of which were 
necessary to complete impregnation. But whenever 
he took less than 50 globules, then not all the seeds 
ripened, but those, which were formed, were perfect. 
_ Ten globules were the least he could take in this 
flower, as less would not suffice for it. The Mira- 
bilis Jalappa had 293 globules of pollen in one flower, 
Mirabilis Jongiflora 321. But in each of the two 
plants 2 or 3 globules were sufficient for impreg- 
nation. ‘The seed did not appear more perfect, 
| though many more globules were put upon the 
stigma. 
To ascertain whether, in flowers with more than 
one style, each ought to become impregnated sepa- 
rately, Koelreuter im several of them cut all off but 
one, and the fecundation was as successful as ever. 
Even in flowers, in which the style was entirely sepa- 
rated, fecundation took place through one of them. 
These experiments shew, that the hollow tubes of 
one style communicate with all the rest, and that more 
styles and more pollen are formed, merely to ensure 
their final determination. From this circumstance 
philosophers have concluded, that the cellular tex- 
ture of all germens fixed in the receptacle, must co- 
here amongst each other. 
§ 292. 
The great and wonderful process of generation 
has led various philosophers to form peculiar, and 
often very singular hypotheses of their own, which 
each has tried to establish by a number of arguments. 
& 2 To 
