European enamels . e imperfections ofwhich he is conscious generally appear out of place,because readers will be apt to consider that he whoseeks to apologise for his speech had better haveremained silent. If, however, this work should befound deficient, it will not be for want of an earnestdesire, and a considerable time spent in trying toget it right. The aim of the author has been, notto pursue the paths of minute archaeological re-search, but to try to present a broad general viewof the subject. It is hoped also that the familiaritywhich he may claim to possess of the techniqueof the art m
European enamels . e imperfections ofwhich he is conscious generally appear out of place,because readers will be apt to consider that he whoseeks to apologise for his speech had better haveremained silent. If, however, this work should befound deficient, it will not be for want of an earnestdesire, and a considerable time spent in trying toget it right. The aim of the author has been, notto pursue the paths of minute archaeological re-search, but to try to present a broad general viewof the subject. It is hoped also that the familiaritywhich he may claim to possess of the techniqueof the art may have helped in places to illuminethe subject, and may induce his readers to viewwith indulgence the errors that no doubt theirvigilance will detect, but which are to some extentinevitable in a subject upon which so few regulartreatises have been written. Thanks are due to the Burlington Fine ArtsClub for permission to use the negatives of someof their plates. H. H. C. Barn Ridge, Nutfield, SurreyJune, 1906 xvi 4. THE GOLD CUP OF ST. AGNES AT THE BRITISH MUSEUM EUROPEAN ENAMELS CHAPTER IINTRODUCTION IN its widest sense the word enamel includesall sorts of brilliant varnishes, as for instancethose covering baths or bicycles. It is, how-ever, more correctly applied to shining glazes madeof glass, which are melted and caused to adhere bymeans of heat to the surface of pottery, slate, ormetals. Glass is a compound of silica, or flint, with soda,or potash. It is made by finely powdering thematerials and subjecting them to a white addition of some oxide of lead in the glassmakes it more refractive of light, and at the sametime more elastic and more easily fusible. Although glass when cold is chemically veryinert, so that hardly anything except hydrofluoricacid acts upon it, yet when hot it has very power-ful solvent qualities. By this means it may becoloured, for many metals are capable of impartinga characteristic colour to glass. Thus iron gives asickly green, copper a t
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