TN8ECT ENOTNEERINO. 



201 



•^ 





FIG. 68. — THE ORIGINAL BROOK- 

 LINE BRIDGE. — " ENGINEER 

 C'^ S _ ARACHNE MAKES THE FIRST CROSSING." 



trips back and forth, until it is strong enough to serve 

 as a fovuidation cable. A second cable is stretched in 

 a similar manner, and then the little architect proceeds 

 to weave in her snare." 



" How long are those foundation lines ?" asked the 

 Schoolma'am. 



" That depends upon the direction of the wind and 

 character of the site. If there are elevated objects 



