84 



AMERICAN SPIDERS AND THEIR SPINNINGWORK. 



Thus, to follow her course from R2 she would descend to the next 

 radius, R3, by such a direct drop. When her string is attached to the 



jioint X, on this radius, she will pursue the ordinary method and 

 M^fh^^^ 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 })oint 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 s})iral scaifold, and so 

 down the next radius to the points of intersection, x. When she has 



Fk;. 83. Swinging around the circle. 



reached radius No. 10 it is again possible for her to proceed by dropping 

 directly from lier last i)oint of intersection to tlie radius next below. 



It will b(! observed that an alternate course of progress is possible for 

 the spidei- at certain sections of her orl). Foi- exani])le, betAveen 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 di'0})ping from the point 

 z or swinging along the radius of the scaffold, slie may pass 

 R ^H^H^^ from x3 directly along Die line n, svi})porting herself by the 

 Spirals l^eaded spiral last wrouglit in. This she sometimes undoubt- 

 edly does. Blackwall expressed the opinion iliat the last made 

 viscid spiral line is also used as a support while s})imiing the next s})iral 



