The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 276
When it is desired to empty the lock, theralve-gateo, communicating with the lower level, through the channel n n,is opened ; at the same time, the| valve-gate i (which is connected with thesame), communicaiing wilh the lock cliamber, through the pipe c c, isclosed- the water is thus discharged… … Fig. 3. The inventor does not propose to confine himself to the precise mode ofconstruction shown in the plan, but purposes availing himself of differentmodes of construction to suit different localities where gates for discharg-ing water are used ; the principle remaining the same, which consists…
Architecture · Civil engineering · Science
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