This section is from the book "The Relation Of Food To Health And Premature Death", by Geo. H. Townsend, Felix J. Levy, Geo. Clinton Crandall. Also available from Amazon: Clean Food: A Seasonal Guide to Eating Close to the Source with More Than 200 Recipes for a Healthy and Sustainable You.
"The raspberry is one of the most palatable of the summer berries, but it is sc much like the blackberry and blueberry they may all be discussed together."
"They differ in this; they contain more seeds, or at least larger ones, and less water, and instead of being laxative, as are most fruits, they are astringent, and wine made of blackberries is one of the most common remedies for diarrhoea or summer complaint."
"Aside from their acid, and mineral salts, which are similar to those of the strawberry, they contain little, except sugar and their agreeable flavoring matter, common to various other fruits."
"Tannic acid, or something equivalent to it."
"The elderberry and blueberry. The elderberry is not extensively used, although it makes an agreeable wine, and is made by many people for home use. The blueberry is a berry of commerce, of which there are several varieties.. It has an agreeable flavor, and is not very pronounced in its action, because it contains little but seeds, sugar and flavoring matter."
"Cranberry, gooseberry, and currant, are all popular fruits. The cranberry is more extensively sold than any of the others."
"Because it matures late in the season, and is easily kept all winter."
"Malic and citric acid in large amounts, a little flavoring, and an exceedingly tough skin."
"On account of the strong acid and skin of the cranberry, it disagrees with most people. If used at all, it should be. stewed and strained so that the tough skins come off. This would practically make a jelly of it. The acid is exceedingly acrid, somewhat astringent and of rather doubtful use. It is sometimes useful as a disinfectant for inflammations, and is usually applied as a poultice."
"The gooseberry is much more favorably known in England than this country, as it requires a cool, moist climate for good fruit. It also has a tough skin and large seeds, and nothing to recommend it except its flavor and the sugar its contains. When green, it is very sour, but when fully matured and ripe, it contains quite a large per cent of sugar, more in fact than most other fruits. The currant is another tough-skinned fruit with large seeds. It does not differ greatly from the gooseberry, except that it never has so high a per cent of sugar. None of these berries should be used with their skins, and they are therefore more suitable for making jams and jellies, than for any other purpose."
"The mulberry has never been so extensively grown as its flavor would certainly warrant. There are few berries as rich as the mulberry, and it ought to have been planted everywhere, instead of the cherry, although it does not produce so large a crop nor is it so sure to bear."
"It is very rich in its flavoring matter, has a high per cent of sugar, and contains about one and a half per cent of tartaric acid, and is therefore more like the grape than any other berry. It also contains considerable potash."
 
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