| Abstrakt: |
It is an interesting fact that the water content of the edible snail, Helix pomatia, varies with the physiological condition of the animal. Duval (1930) showed that the osmotic pressure of the blood varied from Δ = − 0·37° to ‒ 0·43° in hibernating animals, and from — 0-30° to — 0-40° in active summer animals. Cardot and Troussier (1929) found that the blood volume was considerably greater in active than in hibernating animals, and Brand (1931) showed the same to be true of the water content of the whole body. In the present paper, the observations of Duval (1930) on the osmotic pressure of the blood are repeated, using the very accurate thermo-electric method described by A. V. Hill (1930 a). |
