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« Last post by cagney on November 29, 2024, 12:34:30 AM »
Topaz I think represents an early term and an indication of what type of yellow you were liable to get using uranium, insofar as glass formulas anyway. A shorting of the term topasglas.
I am in complete sympathy with you on the various cryptic terms inserted here and there and then left buried. Chameleon glass does seem to have been a thing. From the "Report of the Committee on Exhibitions of the Franklin Institute" 1847 #638 glassware from the Union Glass Works. " The articles, consisting chiefly of cologne and toilet bottles,-opal,turquoise,green,chameleon &c., were made in an open or hollow ware furnace, of bottle glass. Many of the tints are as rich as would be expected in flint glass.The hock and toilet bottles, of colored opaque body, are considered as deserving a First Premium. A year later in a advertising circular put out by the same company amongst Druggist and other wares they list "Bohemian and colored glass" then go on to list colors "Ruby,Canary, Turquoise, Victoria Emerald" below this another listing "emeralds, blues,Greens,Ambers,Purples,Amethyst, Amarite,Black, White, Agate, and Chameleon . Also mentioned is "Enamels of every Colour'.
As to the QV bowl and your thread you seem to be ' between a rock and a hard place " as we say over here. On the one hand you the Powell/Whitefriars experimental formulas of 1833-1836, on the other hand you have Ford making Canary glass 1839. No actual documentation of any English glassworks producing such glass in 1837. I commend you on your fortitude, savy and determination. Your thread is is almost becoming a database on the subject.
NevB's gobleti interesting. From the photos I cannot tell what uranium brings to the glass color. Seems to look like a nice medium amber, probably should ask Nev.
I leave you with this tidbit from Deming Jarves agent [spy?] in Europe from a letter sent probably 1850 s