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" ... gelatine and alumina. This material is prepared in the form of slabs, for the photographer's use, in this way : The tablets or slabs are composed of gelatine or glue in its natural state, and are immersed in a bath of alumina, which is held in solution... "
Patents for Inventions: Abridgements of Specifications Relating to Photography - Page 52
by Great Britain. Patent Office - 1861
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The Annual of Scientific Discovery, Or, Year-book of Facts in Science and Art

1858 - 448 pages
...immersed in a bath of alumina, which is held in solution by sulphuric or acetic acid ; by this means a complete combination takes place between the alumina and the gelatine or glue. The tablets or slabs should remain in the bath a sufficient time to become thick enough for the purpose for which...
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The Annual of Scientific Discovery, Or, Year-book of Facts in ..., Volume 9

1859 - 448 pages
...immersed in a bath of alumina, which is held in solution by sulphuric or acetic acid ; by this means a complete combination takes place between the alumina and the gelatine or glue. The tablets or slabs should remain in the bath a sufficient time to become thick enough for the purpose for which...
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The Annual of Scientific Discovery, Or, Year-book of Facts in ..., Volume 9

1859 - 448 pages
...immersed in a bath of alumina, which is held in solution by sulphuric or acetic acid ; by this means a complete combination takes place between the alumina and the gelatine or glue. The tablets or slabs should remain in the bath a sufficient time to become thick enough for the purpose for which...
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Journal of the Franklin Institute, Volume 33; Volume 63

Franklin Institute (Philadelphia, Pa.) - 1857 - 526 pages
...immersed in a bath of alumina, which is held in solution by sulphuric or acetic acid ; by this means, a complete combination takes place between the alumina and the gelatine or glue. The tablets or slabs should remain in the bath a sufficient time to become thick enough for the purpose for which...
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The Chemist

1858 - 796 pages
...immersed in a bath oi alumina, which is held in solution by sulphuric or acetic acid ; by this means a complete combination takes place between the alumina and the gelatine or glue. The tablets or slabs should remain iu the bath a sufficient time to become thick enough for the purpose for which...
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American Journal of Pharmacy, Volume 30

1858 - 606 pages
...immersed in a bath of alumina, which is held in solution by sulphuric or acetic acid ; by this means a complete combination takes place between the alumina and the gelatine or glue. The tablets or slabs should remain in the bath a sufficient time to become thick enough for the purpose for which...
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