Fish oil

Definition and stakes

The New Student's Reference Work (1914)

“ Neatsfoot-oil is produced by boiling the feet of cattle. Sperm-oil and other fish-oils are obtained from different varieties of fish and sea animals, as the whale, seal, cod, shark or herring. The uses of the different oils are very numerous: as food and in the preparation of food, in soap-making, painting, machinery and in a thousand other ways they are of great importance. There is a large class of substances known as the essential or volatile oils which resemble the fats somewhat in their properties, particularly in not mixing with water. ”
Source: Wikisource

Arnold James Cooley,  Cooley's Cyclopædia of Practical Receipts and Collateral Information in the Arts…

“ The oil is violently agitated along with 11⁄2 to 2% of concentrated sulphuric acid, when it assumes a greenish colour, and, after about a fortnight’s repose, deposits much colouring matter, becomes paler, and burns with greater brilliancy, particularly if well washed with steam or hot water, and clarified by subsequent repose or by filtration. This answers well for most of the recently expressed vegetable oils. It also greatly improves most of the fish oils. ”
Source: Gutenberg

1911 Encyclopædia Britannica, Volume 11… (1911)

“ These, after the oil is extracted from them, serve the islanders with food for the winter. The oil has been chemically analysed and found to be a fish-oil, and to possess nearly all the qualities of that obtained from the liver of the cod, with a lighter specific gravity. It, however, has an extremely strong scent, which is said by those who have visited St Kilda to pervade every thing and person on the island, and is certainly retained by an egg or skin of the bird for many years. Whenever a live example is seized in the hand it ejects a considerable quantity of this oil from its mouth. ”
Source: Wikisource

Get perspective with Kwize: daily news enlightened by great literature