84 AMERICAN SPIDERS AND THEIR SPINNINGWORK. 
Thus, to follow her course from R2 she would descend to the next 
radius, R38, by such a direct drop. When her string is attached to the 
point x, on this radius, she will pursue the ordinary method and 
pass around to the spiral scaffold at its point of intersection (z) 
with the radius. Here now it is again possible for her to drop 
from z to x, on the radius marked 4, From this point onward, while pro- 
ceeding across her orb, and during the ascent from R4 to R16, her habit- 
ual method is to swing around the radius to the spiral scaffold, and so 
down the next radius to the points of intersection, x. When she has 
Varying 
Methods. 
Fic. 83. Swinging around the circle. 
reached radius No. 16 it is again possible for her to proceed by dropping 
directly from her last point of intersection to the radius next below. 
It will be observed that an alternate course of progress is possible for 
the spider at certain sections of her orb. For example, between the radii 
3 and 4, and 4 and 5, instead of moving from the point of intersection, 
x, along the radius to the spiral scaffolding, and dropping from the point 
z or swinging along the radius of the scaffold, she may pass 
Walking from x3 directly along the line n, supporting herself by the 
Pi beaded spiral last wrought in. This she sometimes undoubt- 
edly does. Blackwall expressed the opinion that the last made 
viscid spiral line is also used as a support while spinning the next spiral 
