Isinglass
From London's Ghost Acres
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 beer. It can also be cooked into a paste for specialized gluing purposes.
https://en.wikipedia.org/wiki/Isinglass
Contents
British Pharmacopoeia 1867
Isinglass
“The swimming bladder or sound of various species of Acipenser… prepared and cut into fine shreds.” (381)
A Compendium of Domestic Medicine, 1865 Isinglass
All page numbers are recorded as (PDF #/SOURCE #)
Cookery for the Sick that includes
- An Excellent Jelly (Another) (360/339): boiled shavings of isinglass, with Jamaica Peppers, and a brown crust of bread. Makes a jelly that can be “taken in wine and water, milk, tea, or soup.”
- Coffee Milk (361/340): shaved isinglass added to ground coffee that has be boiled in milk. Used to clarify the mixture.