Refined gelatine : a pure and economical substitute for Russian isinglass : forming a colourless jelly, which possesses all the properties of the best calves' feet jelly : directions for use.

Licence: Public Domain Mark

Credit: Refined gelatine : a pure and economical substitute for Russian isinglass : forming a colourless jelly, which possesses all the properties of the best calves' feet jelly : directions for use. Source: Wellcome Collection.