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 . acis, thofetv/o Defences will be a confiderable Obftrudiion tothe Bef
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 . acis, thofetv/o Defences will be a confiderable Obftrudiion tothe Befiegers, all the Time they are raifing Batterieson 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 thegreateft Part of ihe Parapet 11 is throv/n down •, andi-^arapet 11 may be m^ade fo large a Body of Earth,as to coft the Befiegers much Time to deftroy it, evenin a dry Situation where Mines can be made ; but ifthere is Water tafill fiie Ditch, fo that Mines cannotbe rnatie, fuch a Parapet will very much retard theSieoe. The Plates VI and VII being well underftood, it( in my Opinion ) will appear that Ricochets andStones will have but little Effed: 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 t au!e Brav- ^. ( lOI ) new Works; Shells and Cannons will in Time deftroythtfe Defences, and the ftrongeft Works cannot re-fift Mines properly made, yet notwithftanding which,jt appears to me the Methods here propoled toilrengthen Places alreacjy fortified, are not whollychimerical. CHAP. IV. Explanation of Plate F. N this Plate is fhown how a Circle may be forti-fied, which I think is an entire new Invention,Fig. I. The Plan, and Fig. 2. The Profile, whichbeing connected by dot
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