io6 VEGETABLE STRUCTURE. 
which, tho’ very minute, yet if preferved from injuries, will be fure to 
grow when it has heat and moifture. It is defended doubly j partly by the 
Membrane, and partly by the waxy fluid which furrounds it. It is too 
tender for the earth, and is to be received firfl: into the Seed. 
This is the origin of a globule of Farina j which we are now to exa- 
mine diftincftly. To this purpofe we are to take off a perfedtly ripe An- 
thera, from its Filament, and to fliake it carefully over a plate of glafs, 
for the Double Microfcope. This flight motion feparates a multitude of 
the globires of Farina, a clufter of which we are to felcdt for examina- 
tion. They are all perfedlly alike in flaape ; oblong, elliptic, rounded at 
each en i, fomevvhat opake, and of a whitifla colour, with a darker oblong 
particle in the middle. This is fometimes greenifla, fometimes yellowifh, 
and is the embryo Plant ; the extreme termination of the portion of the 
Flelh of the original Stalk, which raifed that Blifter : and it appears greenifli 
or yellowifh as more or lefs of the waxy matter covers it. On putting a 
drop of water to them, they fwell, become flaorter, rounder, and more tranf- 
parent j and we perceive a fmall llrake in the midfl; of each running length- 
wife from end to end. One of the Globules, as it appears dry, is repre- 
fented at Fig. 22, and as it is feen in water at 23. The line is the place 
where the Globule adhered to the inflde of the Anthera, and is the part 
where it opens at a proper time, to let out the embryo Plant, as at 24. 
It has been faid all globules of Farina burfl: when wetted, and difeharge 
ELASTIC Atoms : fome burfl: readily j others do not: but whenever they 
do burfl, what they difeharge is this embryo Plant, encompafled with a waxy 
matter, which, not mixing with the water, appears granulated. That 
is all. 
It feems, from the experiments I have hitherto made, that tlipfe Farina 
which have rough furfaces, and are large, burfl upon the head of the Style j 
as the Mallow kinds; and only the embryo Plant, covered with is waxy 
Juice, enters the Secd-Veffel : on the contrary, that thofe Farinae which 
are fmall, fmooth, and of a fit fhape to make their way entire into the 
Seed, are received into the Piflil without burfling : this is the cafe univer- 
fally with the Farina of the Radifli, which therefore does not burfl fo 
readily in water. However, as moifture is in the end to caufe its opening, 
what is to be tranfadted naturally within the Seed, may be done on the 
plate of glafs. The Farina muft be perfedlly ripe for this purpofe ; a 
great deal of it muft be laid upon the glafs, and the drop of water often 
renewed. By this means we fhall fee one or other of the Globules burfl : 
the opening always is at the line in the center, and ufually towards one 
1 end 
