 | Andrew Ure - 1821 - 436 páginas
...required to be very strong. It sometimes happens, that jewellers, in letting precious stones, break oft' pieces by accident; in this case they join them so...stone as a ground, to produce the appearance of an onyx. Mastic is likewise used to cement false backs or doublets to stones, to alter their hue. The... | |
 | Andrew Ure - 1821 - 436 páginas
...if the joining be not required to be very strong. It sometimes happens, that jewellers, in setting precious stones, break off pieces by accident; in this case they join them so tliat it cannot easily be seen, with gum mastic, the stone being previously made hot enough to melt... | |
 | Andrew Ure - 1827 - 904 páginas
...second. It sometimes happens, that jeweilses, in setting precious stones, break offpicces b, socident ; in this case they join them so that it cannot easily be seen, with gum mastIc.¿ the aLone being previously made hot enough to siselt it. By the same medium cameos of white CnanreZ or... | |
 | Andrew Ure - 1828 - 872 páginas
...to be very utrong. CEL СЕМ УОС j in Arme «OIKIt sometimes happens, that jewellers, in setting precious stones, break off pieces by accident ; in...stone as a ground, to produce the appearance of an onyx. Mastic is likewise used to cement false backs or doublets to stone«, to alter their hue. The... | |
 | Andrew Ure - 1831 - 980 páginas
...if the joining be not required to be very strong. It sometimes happens, that jewellers, in setting precious stones, break off pieces by accident: in...coloured glass, are often joined to a real stone as aground, to produce the appearance of an onyx. Mastic is likewise used to cement false backs or doublets... | |
 | Luke Hebert - 1835 - 816 páginas
...It sometimes happens, that jewellers, in setting precious stones, by accident break off pieces ; m this case they join them, so that it cannot easily...stone as a ground, to produce the appearance of an onyx. Mastic is likewise used to cement false backs or doublets to stones, to alter their hue. The... | |
 | Luke Hebert - 1836 - 814 páginas
...It sometimes happens, that jewellers, in setting precious stones, by accident break off pieces ; m this case they join them, so that it cannot easily...stone as a ground, to produce the appearance of an onyx. Mustie is likewise used to cement false backe or doublets to stones, to alter their hue. The... | |
 | 1838 - 348 páginas
...well, if the joining be not required to be very strong. It sometimes happens that jewellers, in setting precious stones, break off pieces by accident; in...melt it. By the same medium cameos of white enamel or colored glass are often joined to a real stone as a ground, to produce the appearance of an onyx. Mastic... | |
 | Andrew Ure - 1844 - 756 páginas
...mastic alone is sometimes used by jewellers to cement by heat cameos of white enamel or colored glass to a real stone, as a ground to produce the appearance of an onyx. Mastic is likewise used to cement false backs or doublets to stones, to alter their hue. Melted... | |
 | Charles Barlow - 1772 - 496 páginas
...nm-tir alone is sometimes used by jewellers to cement, by heat, cameos of white enamel or coloured glass to a real stone, as a ground to produce the appearance of an onyx. PLUMHKKS CEMENT. — Black rosin one part, brick dust two parts, well incorporated by a melting... | |
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It sometimes happens, that jewellers, in letting precious stones, break oft' pieces by accident; in this case they join them so that it cannot easily be seen, with gum mastic, the stone being previously made hot enough to melt it. By the same medium cameos... 
