62 _ Mr. Ware’s Design for 
Arr. VII.—A Design for making a Public Road under the 
Thames, from the east side of the Tower, near Iron-Gate 
Stairs, to the opposite side of the River, near po one 
down Stairs. By Samuel Ware, Esq. 
[Communicated by the Author.] 
The carriage-road . . . 28 feet wide. 
Internal Dimensions | The height above the road . 18 feet. 
of the The foot-paths . . . . 14 feet wide. 
Arche The greatest width . . . 42 feet. 
The greatest height . . . 21 feet. 
The following particulars of the Esrrmare describe the mode of 
erecting the arch-way :— 
Compensation for the ground and buildings on the north 
side of the river, and for the ground and buildings on 
the south side, to form the approaches; cofferdams, in 
ten successive lengths or removes, to keep out the 
water; and strutting, to keep up the ground. 
Steam-Engines, to keep the works within the cofferdams 
dry, and subsequently for draining the’ road, should 
there be occasion. 
Digging out a channel, in the bed of the river, for the 
arch-way, and the ground for the approaches. 
Removing the refuse earth ; claying, filling in, and level- 
ing, two feet above the extrados of the arch. 
Yorkshire Ledgers for the foundations of the arch-way, 
and walls of the approaches and embankments, and 
piling as occasion may require. 
Stone-work, cut in voussoirs, of the arch, and counter- 
arch. 
Lining with lead, 10d. to the foot superficial, enveloping 
these arches. 
Super-arch of brick-work, lined externally with tiles in 
cement. ‘ 
