Journal of the Franklin Institute; devoted to science and the mechanic arts (1826)
Franklin Institute (Philadelphia, Pa.) · Oxford, Eng. [etc.] Pergamon Press [etc.] · leaf 82
op is introduced into A2. To the air-pump may be substituted asmall coal fire; I believe it is this system which was originally pro-posed by the inventor. This seems a really practical invention. Canals and Canal Conveyance. 75 An important object of consideration is the loss of time in passingfrom… … for giving the lower locks the same dimensions as the upper ones; letthem be larger if they can easily be supplied with w^ater. Signalsshould be used to warn the lockmen at the approach of boats; doublelocks should be preferred, although they cost more; the openings foradmitting water should be…
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