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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is, thofetv/o Defences will be a confiderable Obllrudion to the Befiegers, all the Time they are raifing Batteries ■on the Ridge of the Glacis to hlence them ; and byinfpefting Fig. i. it is evident the Covert-way cannot be taken till the Defences P and S are ruined,which cannot well be done (^as I faid before) till thegreateil Part of ihe Parapet 11 is throv/n down •, andparapet 11 may be m^ade lb large a Body of Earth,as to coft the Beiiegers much Time to deftroy it, evenin a dry Situation where Mines can be made •, but ifthere is Water to fill t)ie Ditch, fo that Mines cannotbemade, fuch a Parapet will very much retard theSiege. The Plates VI and VII being well underllood, it( in my Opinion ) v\fill appear that Ricochets andStones will have but little Elfeft upon the additional new * The Defence at S is nearly anfwering the Defence of aFaufe Bray, but is not liable to be enfiladed ; nor are the Troopsplaced there, liable to be drove out by Shells and Stones, as inA Kaufe Bray.
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( 100 ) placed at 12, will do much Execution in Cafe of anEnemys March upon the Glacis, to attack theCovert-Way before the Parapet 11 is deftroyed; andthe Mufquetry at S and P will alio do much Executi-on on the Covert-Ways, and prevent the Befiegersmaking Lodgements there, even fuppoHng theTroops are drove out of both the Covert-Ways, todo which will coft the Befiegers dear -, for till theParapet 11 on the Covert-Way is deftroyed, theDefence at *S cannot well be ruined, it being: BombProof above, and covered from Cannon by the Para-pet II , the Covert-Way P at the Bottom of theEfcarpe will likewife help to defend thefe Covert-Ways •, fo there muft be four Defences deftroyed be-fore the Enemy can maintain their Ground on theCovert-Way •, and as two of thofe Defences cannotbe fiienced, till the Parapet 11 is thrown down, andBatteries raifed upon the Ridge of the Glacis, thofetv/o Defences will be a confiderable Obftrudiion to the Befiegers, all the Time they are raifing Batterieson

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