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LXX. Description of a Lock designed for the Regent's Cnnnl 

 Company. By Mr. Richard Hall Go\V£K, rf Ipnuich* , 



Explanation. 



J. H E plan of a doul)le lock, whereby twice the facility of transit 

 is obtained, with only ho/f the expenditure of water. 



Example. A and B (Plate IV.) are locks havinj^ a commtini- 

 cation by means of the sluices W and x in the middle pier. Now 

 admittin'ii: lock A shall be full, and lock B empty, at the same 

 time ti>at two barges sliall arrive, the one going down, and the 

 other up the stream ; the barge going down will naturally enter 

 the lock A which is ready for her reception ; while the other 

 will enter B. The sluices and gates being now shut, let the mid- 

 <lle pier sluices be opened, so that the water may flow from lock 

 A into B (view the transverse section), whereby the barge in A 

 will be lowered, and the barge in B raised, till both are on a level ; 

 at which time the barge in A will be half up, and the barge in 

 B half down. Now shut the pier sluices W and x, and open the 

 hide sluices y and z, whereby lock A will continue to empty, 

 and B to fill," till the water in each obtain the level of the lower 

 and upper canal: — the gates C and D being then opened, each 

 barge is at liberty to depart, the one up and the other down the 

 stream ; the time employed to pass them being no more than 

 the time employed in passing 07ie barge through a single lock ; 

 and to perform this double duty, only one full lock of water has 

 been withdrawn from the upper level of the canal. 



* Mr. Gower (author of sevenil works relative to Seamanship and Ma- 

 rine affairs) was one ot the candidates for the reward of a hundred guineas 

 offered hy the Company for the best design of a lock, in an advertisement 

 of which the following is a copy : 



" RtoENTS Canal. — To Architects, Engineers, &c. a reward of 100 

 guineas is offered for the best design of a double or single lock, to be con- 

 structed in the said canal. In these designs, part of tiie lock must be de- 

 scribed and set forth. In judging of these desi.-ns, the saving of water, anU 

 the facility and e.xpedition in passing the lock, will be objects of the greatest 

 consideration ; and any practicable suggestions for returning the water to 

 the upper leveh will have great weight in the decision. Tlie length of the 

 lock must be 8f) feet, the breadth of each, in the clear, must be 14 feet 

 :i inches ; the average fall of water of each lock 7 feet ; tlie width of the 

 canal 45 feet ; the depth of the canal 5 feet.— .\ny person willing (o exe- 

 cute his design, is requested to accompany it with an estimate of the lock 

 complete, for so much each lock. The designs are to be submitted to thrca 

 engineers or scientific men, and the premium given according to the deci- 

 nion of the majority of them; and to ensure perfect confidence in the d( ci- 

 nion, candidates are to send their designs, marked, to be returned uM.)pfned. 

 if the design to which it refers is not approved, and should not obtain the 

 premium. The designs to be sent to Messrs. Edwards and Lyon, Solicitors. 

 Great Kussell-street, Bloomsbury, on or before the lilst of September ISlJ." 

 — y'.meA Xaicspuper, ^>Hi Sept. 1R12, 



Vol.fjJ. No. 27S. June IS'.'.l. 3 IC 1 be 



