Show SUBURBAN ROADWAY substantial and anil thorough cli tit of telford highways the following description of tuo the method of constructing a substantial roadway according to ideas of telford will impress I 1 lie reader as thorough but it suggests an undue and perhaps unnecessary thickness of the separate layers and a CODEe quent waste of matei matoi hil ial A description da of the work us Is dono done on a road in new york city may lio be useful the roadbed is trimmed tri mined to the required form which is a descent of eight inches from the curb along lio center strip to the outer curb antl and the arcu 1 l is ig alliado ado firm by tile uso use of a cj 61 ton lon rola rolar r upon tha ilia prepared roadbed a pavement of quarry stones is ret fet by hand tile the stones being from 6 8 to 10 inches la depth 3 to 6 inches in width and not exceeding 14 inches in length and of as aa nearly a uniform eizo as possible with parallel sides the stones ire arc laid lengthwise across the road with the broadest edges down af after ur being closely set together they fire are firmly ived wedged geI by inserting and driving a down with a bar used for that purpose in all pos possible places stones of tile mine depth until every stone is bound and clamped in tho the proper position tho the projections of tho the tones stones on the top op of the ho pa pavement rement are arc then broken off with a light hammer end and tho sp 1113 worked into tho the interstices not already filled by tho the pro process closs of wedging iv by which the pavement is reduced to an even of eight inches 1 14 CROSS section or OF TELFORD KOLP broken stones at gneiss of 1 a I cz size a to tc pass through a ring 2 inches in ahm im eter are then spread evenly over the pavement to sucha such 1 depth as will make eix eis inches when rolled this biyer is then rolled first with a CIA citon ci ton horse roller so BO that tho the steam roller can call pass over without difficulty and when thoroughly compact is in readiness fer tile the top 1 layer yer tho the top layer is of broken stone of trap rock of a size to pass through ii a ring I 1 J inches in diameter spread evenly over to tuch a depth as will bring the surface to tho the proper grade after teiei being made thoroughly compact screened gravel to the depth of about 1 lj J inches is spread ou on top and thoroughly rolled both the stone and i gravel ravel are kept well moistened by means of sprinkling carts while the rolling is going on and the gravel working down into the interstices under tho the roller consolidates the whole ma material when completed the tha entire depth of pavement stone and gravel is IS 18 inches it has been found impracticable to consolidate the stone when placed on the road bythe by the hea heaviest riest rolling with a I 1 10 G ton steam roller without somo some bandin binding material hard biard gravel lias has been use used d for this purpose as beina pree 6 rall w tile no ave f nue mio is is first thrown throNT Sr 0 travel the roadway is ia kept moist by sprinkling and a man is employed to pick off any stones that may bo be loosened by the feet of horses and a 2 horse roller is 9 kept passing over it until it becomes S ho thoroughly roughly compact and smooth |