4 o6 CANAL BETWEEN THE 



Englifh canals are generally from 3 to 5 feet deep, 

 20 to 40 feet wide, and the lock-gates from 10 to 1 2 

 feet; but they ahfwer the purpofe of inland carriage, 

 n one town to another, for which alone they were 

 defigncd. The depth of the canal, between- the 

 Forth and Clyde, is 7 feet ; its breadth, at the fur- 

 face, 56 feet; the locks arc 75 feet long, and their 

 gates 20 feet wide. It is railed from the Carron by 

 ao lock :\\& of 10 miles, to the amazing height 



of 155 feet above the medium full fea mark. At 

 the 20th lock begins the canal of partition, on the 

 veen the caft and weft leas, and which ca- 

 nal of partition continues 18 miles on a level, termi- 

 nating at Hamilton-hill, a mile north-weft from the 

 Clyde at Glafgow *. In fome places, the canal is car-, 

 ried through mofiy ground ; in other places, through 

 folid rock. In the fourth mile of the canal there are 

 10 locks, and a fine aqueduct bridge, which croflcs 

 the great road leading from Edinburgh to Glafgow. 

 The expence of this mile amounted to 18,000!. At 

 Kirkintulloch, the canal is carried over the water of 

 Logic on an aqueduct bridge, whofe arch is 90 feet 

 broad ; which arch was thrown over in 3 different 

 (Iretches, of 30 feet each, having only 30 feet of a 

 center, which was fhifted on fmall rollers from one 

 ftretch to another. Though this was a thing new, 

 and never attempted before with an arch of this fize ; 

 yet the joinings are as fairly equal as any other part 



* From this termination of the canal, there is a defcent to the 

 le of many feet, on which account there can be no junction of 

 CTS at an expence lefs than zo,cco cr 30,000!. though 

 the difiance doth not exceed a mile. Should that city recover 



lotfes fuftaincd by the American war, and the revolt of thole 

 pro bable that this junction may be effected by a new 



iubfcription. With a view to this defirable obje<ft, it might be ex 

 pedient to procure an eftiraate of the expence from Mi 

 during his abode in that country, fuperin tending the main nr 



. The d : Glafgow, in ipring tides, is from 



6 to 7 feci ; and ii. feet, 



of 



