. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 110 CALIFORNIA FISH AND GAME. It follows that if a solution can enter into the cell, it wonld have first to i^ass throuiih the i)rott)i)]n l)y way of the cell's wall; but livino: proto])lasni. unlike its walls, gives permeability to all substances in solu- tion in \arying amounts, segregating certain crystailoidal bodies from others, according to conditions. This power of decision is not entirely limited to tlu' outer protoplastic
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 110 CALIFORNIA FISH AND GAME. It follows that if a solution can enter into the cell, it wonld have first to i^ass throuiih the i)rott)i)]n l)y way of the cell's wall; but livino: proto])lasni. unlike its walls, gives permeability to all substances in solu- tion in \arying amounts, segregating certain crystailoidal bodies from others, according to conditions. This power of decision is not entirely limited to tlu' outer protoplastic covering or membrane. The vacuole's wall has a similar distinction in its selective ability, and this selective powci- is s(i nuich gi'caler than llic osmotic ])ressures bearing on the i-ells that they often show great variation in cluMuical constituents and quantities to their surrounding medium. It seems remarkable that this medium containing three per cent of chloride of sodium, four one- hundredths of one per cent potash, and with the proportion of iodine so small that it i-equires more than ;M),()()().00{) pounds of the sea water to furnish the kelj) with one single pound of iodine, that we find that the cells of some of the plants select one and eight one-hundredths per cent potash, six-tenths of one per cent sodium, and three one-hundredths of one per cent iodine, in their fresh and natural state. These small. Fig. 58. Cross section of stem of kelp greatly enlarged, X '^OO. Photograph by Edward E. Porteous. elementary substances are large when compared to the quantity of metals the sea holds in solution, and upon which the seaweed has some absorptive power. In the case of gold there is about one grain in every ton of sea water, yet kelp has been known to absorb twenty cents worth of this precious metal to the ton of green kelp. In the case of silver, there is about one grain to every six tons of sea water; but so far, except in the case of Pocillopora alciconis, analys
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