A London encyclopaedia, or universal dictionary of science, art, literature and practical mechanics : comprising a popular view of the present state of knowledge : illustrated by numerous engravings, a general atlas, and appropriate diagrams (1829)
Curtis, Thomas, fl. 1820 · London : Thomas Tegg · leaf 34
, the water, as is shown at H, enters theside of the vessel that is then immersed, andforms an exact balance for the quantity that hasbeen displaced in the lock-pit. If, on the contrary, the navigator wishes todepress a barge, or carry it from a high to a lowlevel, he has only to open the gates and… … N^^ P !3i A-^> ^ INLAND NAVIGATION. 25 application of certain connivances for weighingboats, &c., whether they are laden or empty. Anhorizontal frame of timber is to be erected overa lock, of a sufficient height above the surface oftlie canal to admit boats to pass under it, and ofcompetent…
Encyclopedias and dictionaries · Aeronautics
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