No. 151.] 195 



is to be filled in and consolidated, after which it may be lifted out 

 of any panel or section as may be needed, by sheers or derricks 

 placed above, with tackels hooked into the rings in the panels; the 

 inverted wedge formed portions of the frames, allowing each panel 

 of cement to be freely lifted out and placed on one side, while ac- 

 cess is needed to the parts beneath, and receiving the panel of ce- 

 ment in replacement again when the access beneath is no longer 

 needed. 



The gutter stones, curb-stones and flagging of the sidewalks may 

 all be laid on panelled and divided sections of concrete in the 

 same manner, and with the same advantages and effects. 



When the concrete foundation is fully consolidated, a pavement of 

 granite or sienite stone blocks, averaging about ten or twelve inches , 

 long, four or five inches wide, and a nearly equal depth of about ten 

 inches, are to be carefully laid to an even surface, commencing so as 

 to form (he ranges of stones into lozenge formed divisions, by which 

 the edges are presented diagonally to ^he wheel tires of carriages, 

 or to any other passing weight. The stone over the centre of each 

 section or panel is to have two countersunk holes to receive an in- 

 serted lewis by which it may be lifted out, so as to furnish the com- 

 mencement of a removal to obtain access to the panel beneath. This 

 stone should only be set in clean sand, and all the rest of the stones are 

 to be covered with sand that must be well washed into the interstices be- 

 tween the stones, and then consolidated by a portion of loose grout- 

 ing, that is, hydraulic cement in a sufficient quantity of water to 

 run freely into the sand and harden between the stones. 



The formation of the pavements in diagonal lines with the street, 

 is to be commenced and followed up by placing the first stone of 

 each range so that the side shall form an abutment and tie for the 

 head or fore-end of the first stone in the next range. 



The dimensions of the panels or sections and of the paving stones 

 used, may be varied as required. 



The firm of Messrs. Russ & Reid, proprietors of the Richmond 

 Granite Quarry, offer to the corporation of the city of New-York, 

 to pave Broadway on the foregoing plan, at the rate of five dollars 

 per square yard. 



