Identifier: britishmarsconta00robs (find matches)
Title: 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
Year: 1763 (1760s)
Authors: Robson, Joseph
Subjects: Great Britain. Royal Navy Military art and science Naval art and science Fortification
Publisher: London : Printed for the author, and sold by W. Flexney
Contributing Library: University of Pittsburgh Library System
Digitizing Sponsor: Lyrasis Members and Sloan Foundation

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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
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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 land, not to mentionthe great Number of Cannon and Mortars propofedin this Manner of attacking Places; ail which ren-ders it fcarce prafticable for an Army by land toattack Places in this Manner. Nor will it be prudent, or advifeable, for anyPower that is liable to be attacked on the Sea by afuperior Force to attempt thefe Methods, except infome diilant Part, for the great Number of Can-non and Mortars to be employed on Shore, and theBridges, rolling Parapets, &c. will take up a con-fiderable Time to imbark them, n

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