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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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- ^
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( 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 dotted Lines, their Relation areeafily iinderftood, and Fig. 2. (The Profile) beingexplained. Fig. i. (the Plan) need little explain-ing. Fig. 2. A. The Glacis.B, The great Ditch.C Mufquetoon, Piftol, and Granadoe Defence •, for the Foot of the Scarp, and Bottom of the Ditch.D Paflage under the Rampier to C.E The Entrance into the round Lodgings, G. Fig. I .F Store Rooms, and Bomb-proof Lodgings, for Men, aifo a Paflage round the Place under cover Bomb-proof.G. Fig. 2. Bomb-proof Places quite round under F,H The Ditch roimd th

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