168 THE FAIRY-LAND OF SCIENCE. 
on the other hand, who have the yellow bags (2 b, 
Fig. 45) at the top will find the knob (a) half-way 
down the tube. 
Now for the use of these yellow bags, which are 
called the anthers of the stamens, the stalk on which 
they grow being called the filament or thread. If you 
can manage to split them open you will find that they 
have a yellow powder in them, called pollen, the same 
as the powder which sticks to your nose when you 
put it into a lily; and if you look with a magnifying 
glass at the little green knob in the centre of the 
flower you will probably see some of this yellow dust 
sticking on it (A, Fig. 45). We will leave it there 
for a time, and examine the body called the pistil, to 
which the knob belongs. Pull off the yellow corolla 
(which will come off quite easily), and turn back the 
green leaves. You will then see that the knob stands 
on the top of a column, and at the bottom of this col- 
umn there is a round ball (sv), which is a vessel for 
holding the seeds. In this diagram (A, Fig. 45) I 
have drawn the whole of this curious ball and column 
as if cut in half, so that we may see what is in it. In 
the middle of the ball, in a cluster, there are a number 
of round transparent little bodies, looking something 
like round green orange-cells full of juice. They are 
really cells full of protoplasm, with one little dark 
spot in each of them, which by-and-by is to make our 
little plantlet that we found in the seed. 
" These, then, are seeds," you will say. Not yet ; 
they are only ovules, or little bodies which may be- 
come seeds. If they were left as they are they would 
all wither and die. But those little yellow grains of 
