LIST OF PLATES. 
Chronograph, invented by Lieut. H. Watkin, R.A. 
Development of the Spiral Cam and Firing Mechanism of the Gatling Gun. 
Fire-proof Gunpowder Magazines, Constructed by Messrs. Milner & Co. 
Sketch Plan of Practice Range, &c., Eastbourne Siege Experiments. 
Target Battery, do. 
Sections of Shell Craters, do. 
Diagram illustrating Problem on Trajectories. 
Snider System of Breech-Loading. 
Martini-Henry Rifle, shewing Section of Breech. 
Section of Trigger Action of Martini-Henry Rifle. Full Size. 
Hydraulic Arrangement for Muzzle-pivoting Garrison Carriage, for 10-in. 
M.L.R. Guns. 
Platform for 12*5-in. M.L.R. Guns of 38 tons. 
80-ton Gun in various Stages of Construction. 
Crusher Gauge. 
Le Boulenge Chronograph. Plates I., II., and III. 
The Noble Chronoscope. 
Cutting Plugs. 
Design for a New Russian Field Gun. 
7 C Italian B.L. Gun and Carriage. 
Shrapnel Shell for 7 C Italian Field Gun. 
Cast-iron Nave adopted by Italian Government. 
Position of French and German Armies on the 31st July, 1870. 
The German Advance from 6th to 12th August, 1870. 
Position of French and German Armies early on 16th August, 1870. 
Position of Troops at 9 a.m. on the morning of Gravelotte (18th August, 1870.) 
Position of French and German Armies on 25th August, 1870. 
The Battle of Sedan. 
Environs of Metz. 
Autograph Letter of the Duke of Wellington. 
Route Map of Expedition up the Bolan Pass to Klielat Territory. 
Campaign on the Loire. 
Campaign of Le Mans. 
Campaign in the East. 
Campaign in the North. 
