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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e Defences CC, at each End ofthe Ditch L 133 Fathoms. D The interior Slope. E Terre-plain of the Rampier. F Steps to raife the Mufqueteers a fufficient Heightto fire over the Parapet. G The Top of the Parapet. H Interior Slope. I A little Ditch at the Foot of the Scarp. K The Covert-way in the great Ditch. L. Glacis in the great Ditch. j M A narrow Covert-way, N Broad Covert-Way. O Steps up for the Mufquetry to fire upon theGlacis. P The Glacis.Q^A Second Glacis. R The lower Tier of Guns in the metal Batt>*fies,the Corners R archd Bomb-proof, and the Archescontinued under the upper metal Battery S to theOpening T. S The upper metal Battery raifed above the me-tal R, See the Plans, Fig. i, 2, 3. in Plate 6. T A fquare Opening quite down to the Foundation ;the whole Height confifts of three Heights ofArches, the firil Height of Arches being veryhigh, will be two Heights of Rooms for to holdBellows and People to blow away the Smoke:There may be many more Vents than the Open-ing T. The
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( J07 ) The white Places are the EmbralTures for the Can^non, and are reverie to the Embrafilires generally-made, the Nature of working Cannon in thefe Bat-teries are fhown in the fecond Chapter, Page 85. Explanation of Fig. 2, Plate 9.Fig. 5. The Profile of Fig. 2, along the Line XY, Z a Covert-way, the fame in all Refpedls as N in J^ig. I.a Where Troops are to lie to reft under Bomb-proof covering, while others are on Duty at z.b A fmall Redoubt to defend the Salient Angle,c A Glacis before the Redoubt,d Arches Bomb-proof to form a Terre-plain and Parapet for a Glacis,e Steps down to under-ground Communications with the great Ditch L, and to come out at f.f Doors in the Counter-fcarpe to under-ground Paf- fages into Fig. 2.g Traverfes to cover the Troops from the Enfilades, while they defend Fig. 2. The Explanation of the Works cut by the Line,U. W. Fig. 2. Fig. 4. Is the Profile along the Lines, U W bya larger Scale, therefore I will explain by the Profile,and the correfponding Fig

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