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 . firil full ot Rolls, upon which beginto throv/ Earth over the rolling
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 . firil full ot Rolls, upon which beginto throv/ Earth over the rolling Parapets, that liefor a Defence, till you have thrown over a Quan-tity fufiicient to make a Plain, to advance yourrolling Parapets upon, in order to roll over moreRolls, to fill more of the Ditch ; keep the firftRolls v/here they were fixed at firft, and roll otherRolls over them to an advanced Defence, overwhich roll more Rolls to fill up the other Pare ofthe Fofs, which being fufficiently full of Rolls,if a great Fire is made from the Town, throwEarth over the firft fixed Rolls, then over the ad-vanced Rolls, from Hand to Pland, and fo con-tinue five or fix Cafts, or more, if Need be, fromEland to Hand, over the advanced Rolls, till theDitch is fufiiciently filled up for a Pafi^age over. Thus * This Manner of fixing Ladders has not been tryed that Iknow of, bat ii it carry the fame Face to Engineers, whoare prafticed in thofe Arts, as it doth to me^ it is worth be-ftowing an Experiment upon. TJk^:B^e 3 J. L 39 ] Thus may as many Pafiages be made at the fameTime as is neceflary; but if the Bridges fdfcrb-ed in Chap. VII.) prove manageable, the Ufe offuch Bridges will be much the quicker Way tocrofs Ditches. It will eafily be perceived that the foregoing Me-thods of attacking Places of Strength, require agreat Number of Rolls of fo gredt a Size as can-not be conveniently carried by Land, and the mo-ving Bridges will be very cumberfome to hawi toany confiderable Diftance by lan
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