Isinglass Isinglass Isinglass () is a substance obtained from the dried swim bladders of fish. It is a form of collagen used mainly for the clarification or fining of some beer and wine. It can also be cooked into a paste for specialised gluing purposes. Its origin is from the obsolete Dutch "huizenblaas" – "huizen" is a kind of sturgeon, and "blaas" is a bladder, or German "hausen blas", meaning essentially the same. Although originally made exclusively from sturgeon, especially beluga, in 1795 an invention by William Murdoch facilitated a cheap substitute using cod. This was extensively used in Britain in
The Tale of the Fisherman and the Fish The Tale of the Fisherman and the Fish The Tale of the Fisherman and the Fish () is a fairy tale in verse by Alexander Pushkin. Pushkin wrote the tale in autumn 1833 and it was first published in the literary magazine "Biblioteka dlya chteniya" in May 1835. The tale is about a fisherman who manages to catch a "Golden Fish" which promises to fulfill any wish of his in exchange for its freedom. The storyline is similar to the Russian fairy tale "The Greedy Old Wife" (according to Vladimir Propp) and the Brothers Grimm's tale "The Fisherman and His