The seasonal variation in chemical constitution of some of the sub‐littoral seaweeds common to scotland. Part II. Laminaria digitata

In a previous communication, 1 the seasonal variation in chemical constitution of Laminaria cloustoni over a period of two years was given. The present paper outlines the seasonal variation in ash, crude protein, iodine, mannitol, laminarin and alginic acid of Laminaria digitata for the same period. In this case the samples were taken from two different localities, to find the effect of different degrees of exposure on the chemical constitution.