1851 Great Exhibition: Official Catalogue: Class VIII.: William Edward Fitz Maurice
From Graces Guide
283. FITZ MAURICE, The Hon. WM. ED., Hamilton Lodge, Prince's Gate.
Model of 68-pounder gun-carriage, which, by means of a rack and pinion inserted in the platform at the rear of the gun, can be worked with great accuracy by one man; it now requires six.
Model of a mortar platform, worked upon the same principle, the endless screw being substituted for the rack and pinion.
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