The British Mars : containing several schemes and inventions, to be practiced by land or sea against the enemies of Great-Britain ; shewing more plainly, the great advantage Britain has over other nations, by being masters at sea ; to which is added, an appendix, containing a scheme for manning the British navy, with less grievance to the subject; and a scheme to employ seamen ; of a copper mine near Hudson's Bay and of discovering the North-West passage, or determine there is no such passage ; with cautions and directions . ce of a Rock is to be built againft,whole Bottom is nearly upon a Lin
The British Mars : containing several schemes and inventions, to be practiced by land or sea against the enemies of Great-Britain ; shewing more plainly, the great advantage Britain has over other nations, by being masters at sea ; to which is added, an appendix, containing a scheme for manning the British navy, with less grievance to the subject; and a scheme to employ seamen ; of a copper mine near Hudson's Bay and of discovering the North-West passage, or determine there is no such passage ; with cautions and directions . ce of a Rock is to be built againft,whole Bottom is nearly upon a Line with the Fore-Part of the Foundation, and flopes 6, 8 or i o Inchesin every Foot in height, for any Number of Feet,fuppofe 6 or 8 Feet high -, and at that Height over-hangs, or goes upright, or ever lb irregular 3 or 4Feet, more or lefs in Height, and the Bottom of theRock at or above the Surface, flopes backward,downward, {o that no Hold can be got of the Rockfor a Foundation -, if it is only a Rock of eight or tenFeet broad or thereabouts, an Arch may be fprungfrom the Foundation, on each Side, to build the Wallupon before the Rock •, but if the Rock is large, theGround muPc be dug from its Face, and a Founda-tion made, and if the Rock b;ilow is almoft as farout as the Foundation on each Side, fo that there isnot a fufficieat Breadth for a Foundation to keepftrait with the other Foundation j the Foundationbefore the Rock muft be laid out farther than theother Foundation a fufficicnt Breadth, with broad Retreats.
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Keywords: ., booksubjectmilitaryartandscience, booksubjectnavalartandscience
