https://books.google.com/books?id=tEICAAAAQAAJ Samuel Orchart Beeton, ?George Rose Emerson - 1870 - ?Read - ?More editionsTbc beet varnish for photographic purposes is that made by Soehnée frères, of Paris, the composition of which is a secret. Amber dissolved in ohloroform also makes a very good photographic varnish ; but it is very expensive, and unless true Removed a lot of weird code.