1851 Great Exhibition: Official Catalogue: Class VI.: Holtzapffel and Co
232. HOLTZAPFFEL CO, 64 Charing Cross, and 127 Long Acre — Manufacturers.
A five-inch centre lathe for amateur ornamental turning.
Eccentric, oval, spherical, geometric, and other chucks.
Compound sliding rest, with screw-cutting and curvilinear apparatus.
Drilling instrument.
Vertical, horizontal, universal, eccentric, and elliptical cutting frames.
Sets of engine tools, drills, and cutters.
Sets of turning tools, etc., in ivory and hard wood handles.
Instruments for sharpening tools and drills.
Turning squares, bevels, callippers, etc.
Decimal, parallel, and sliding gauges.
Sliding centres.
Polishing apparatus.
Geological hammers.
Engine-divided scales in cardboard.
Odontagraphs.
Parlour printing apparatus.
Aportadometer, for taking offsets in land-surveying, etc.
Specimens of plain and ornamental turning by amateurs, in ivory and other materials; cannel coal, etc.