The seasonal variation in chemical constitution of some of the sub‐littoral seaweeds common to scotland. Part III. laminaria saccharina and saccorhiza bulbosa

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Abstract
In previous communications, 1, 2 the seasonal variation in chemical constitution of the laminariales cloustoni and digitata over a period of two years was recorded. The present paper outlines the seasonal variation in ash, crude protein, iodine, mannitol, laminarin and alginic acid of L. saccharina for the same period. As with L. digitata, the samples were taken from two different localities, to find the effect of different degrees of exposure on the chemical constitution, and the stipes and fronds have been analysed separately. Samples of the annual saccorhiza bulbosa have also been analysed.

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