LIST OE PLATES. 
Face page 
Experimental casemates and walls constructed at Shoeburyness, Plates I. 
and III. 71 
Interior and front views of casemates after debris was cleared away. 76 
Back and side view of solid casemate after the close of the experiments . — 
Plan shewing English and American systems of construction ... 80 
Sections of forts. 88 
Various casemates, English and foreign . — 
Experimental casemates and walls constructed at Shoeburyness . — 
Apparatus used for the experiments on friction.....162 
Curves shewing the effect of varying the rate of motion . —- 
Diagram shewing the coefficients of series “a” at a common rate of motion 
of 8 ins. per minute .... 
Action of Arogee . 179 
The capture of Magdala. 181 
Boute map of Abyssinia..... 186 
Cannon of Muhammad II. 208 
The Dulle Griete.,. 226 
Great gun of Beejapoor..... —— 
u u Agra.............. —-— 
Tzar-Pouschka . —- 
Ancient inscriptions in relief.. 
Boyal Military Academy and Prince Bupert’s Tower, Woolwich Warren. 230 
Small map of Boyal Arsenal, Woolwich. 282 
The Boyal Arsenal, Woolwich, in 1867.. 246 
Sketch map of part of Prussian Bhine Province. 262 
Old Woolwich ... 272 
Woolwich arid its neighbourhood in 1778 .. 
3-pr. M.L. mountain gun .... 343 
Details of 3-pr. mountain gun carriage . 345 
Shells, various ... 346 
