The relative Values of Cod Liver Oils from various Sources. J. C. Drummond and T. P. Hilditch. Empire Marketing Bd., Pub. 35, 1930, London, pp. 129, pl. 1, figs. 5.

This is the complete report of an extensive investigation undertaken under the auspices of the Empire Marketing Board of Great Britain on the composition, manufacture, and medicinal value of cod-liver oil. The report includes a critical discussion of the methods of determining the vitamin A and D content of cod-liver oil; summaries of the color, free acidity, mean saponification value, iodine value, and content of vitamins A and D in fresh liver oils of cod and other fish obtained in various localities in Newfoundland, Scotland, Iceland, and Norway, together with more detailed analyses of certain typical oils; a discussion of the biological factors affecting the vitamin content of cod-liver oils; a detailed report of the investigation of factors involved in the technical preparation of medicinal cod-liver oil; a brief report of cod-liver oil manufacture in Newfoundland; and specifications for cod-liver oils for medicinal use and for animal feeding.