1851 Great Exhibition: Official Catalogue: Class X.: Ash, Claudius and Sons
578 ASH, CLAUDIUS, and SONS, 8 and 9 Broad Street, Golden Square — Manufacturers.
Improved mineral teeth, with gold tubes.
Two sets of teeth, mounted, and some smaller pieces; also single teeth of various forms and colours.
[Artificial teeth, for a considerable period, were exclusively made of the tusk of the hippopotamus, a material closely resembling in colour human teeth, and susceptible of a fine polish. A large number, inclusive of those described, are now made of a peculiar description of porcelain, so intensely hard as to resist steel files: they are consequently united with corundum. They closely resemble natural teeth, and are made of different shades of colour.—R. E.]