22 THE BOOK OF THE PEACH. 



pathway, three and a half or four feet from the back 

 wall. A span twenty feet wide should have two 

 4-inch flows on each side, suspended by hooks made 

 of bar iron quarter-inch by one inch, screwed to 

 and gripping wall-plates, and one return, resting on 

 bricks, on either side the central pathway, thereby 

 conferring additional stability to the whole of the 

 structure or series of structures thus attached to the 

 hot-water pipes. 



The cement joints, as already stated, are easily 

 and quickly made in the following manner : Some 

 rope yarn, consisting of several plies, is cut into 

 lengths sufficient to go round the four-inch pipe 

 three times when placed in the socket. Two rounds 

 of this are driven with the caulking tools into 

 position round the end of the pipe close down to the 

 socket, the two ends of the remaining round of yarn 

 being brought together at and a little out from the 

 top of the socket, so as to form an aperture. Several 

 joints having been operated on in this manner, fill 

 a half-pound or pound coffee-canister (with a lip 

 formed thereto, and having a stout piece of wood 

 attached to serve as a handle) with Portland cement 

 made to the consistency of thick paint, and empty 

 the contents through the aperture indicated into 

 each joint prepared for its reception, so as to 

 completely fill the vacuum between the second and 

 third round of yarn, tapping each joint with the 



