| Description | DM162/10/12/folio 112. Letter to W.G. Armstrong relating to a Large gun. Metal cartridge possibly practicable, breech copy of Prussian rifle breech, details and action of latter, request and instructions for experiment including various barrel linings, cause of guns bursting, breech, shot and velocity, perfection of form, enquiry as to Armstrong's gun at Woolwich. 1 January 1856.
DM162/10/12/folio 118. Letter to W. G. Armstrong relating to a Large gun. Necessity of meeting Armstrong, difficulties of elasticity of long tie bars for lightness of breech expansion of inner gun and tie rods and heavy wedge, explosive power of gunpowder with increased size and weights, requirement of strong gun, specifications for such, requirements and calculations of breech etc., authority and Admiralty report awaited, intention of writing to Palmerston for authority or declining matter. 13 January 1856. |