Editorial note — INDEX

I have purposely gone to older works for these technical details, that is to say, to works written before the general introduction of modern mechanical processes; for example, to Apsley Pellat’s Curiosities of Glass-making, and to the treatise on glass by Porter in Lardner’s series (1832). For the materials used in England in the eighteenth century see Dossie’s Handmaid of the Arts, 2nd edition, 1764.