A late report states the fact that M. Hekel has discovered citric acid in cow's milk, a fact hitherto not admitted. In 40 tons of fresh milk there is as much citric acid, in the form of salts, as in 400,000,000 of lemons; in other words, the average daily milk supply of a cow contains as much citric acid as two or three lemons.
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New Zealand Herald, Volume XXVI, Issue 9285, 12 February 1889, Page 5
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64Page 5 Advertisements Column 1 New Zealand Herald, Volume XXVI, Issue 9285, 12 February 1889, Page 5
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