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The author of this study on cod liver oils is a doctor of pharmacy. After making a few general comments on the therapeutic effects of the oil, its value in maintaining health and its economic significance, he presents the geographic distribution of the cod, types of fishing and methods of manufacturing the oil. The last part of the book has to do with the chemical constitution of cod liver oil and with methods of assaying its content of vitamins A and D. An interesting point is brought out when the oil obtained in the North Sea (Norwegian oil) is compared with that obtained off the coasts of North America and Iceland. The former, although of equal vitamin D content, is definitely inferior in vitamin A. The explanation is that the fishing season of Norway corresponds with the spawning season, when food is scarce and the liver of the fish is
Les huiles de foie de morue. Am J Dis Child. 1938;56(2):474. doi:10.1001/archpedi.1938.01980140244019
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