ARANEA, OR SPIDER. 303 
glues to it the ends of the threads ; it 
then runs along the other wall, drawing 
out the threads as it moves ; and at a con- 
venient distance they are pulled tight, 
and fastened by glueing : thus it pro- 
ceeds, alternately, backward and forward, 
from wall to wall, till the web is of suffi- 
cient size and strength. The first two or 
three journeys are made on the walls, 
but afterwards the spider walks on the 
threads, though newly spun, by which 
means it can attach the cross threads, 
and thus the web is completed. 
Lucy. If I were to press the tubercles 
with my finger, could I draw out a 
thread ? 
Mother, Yes ; out of each tubercle 
you would draw a thread, apparently 
single to the naked eye ; but when seen 
through the microscope, it is found to be 
composed of a vast number of smaller 
threads, which unite at a short distance 
from the apertures. 
Lticyi ' Something like the silken 
R 2 
