. Carnegie Institution of Washington publication. 40 Papers from the Marine Biological Laboratory at Tortugas. In figure 6 the full line and open circles represent the rates in sea-water diluted with molecular dextrose, and the dotted line and black circles show the rates in sea-water diluted with distilled water. Table 6. Composition of the solution. s. w. = sea-water. d. distilled water. Relative rates of nerve-conduc- tion, that in natural sea- water being 100. Sea-water di- luted with dis- tilled water, thus corre- spondingly reducing osmo- tic pressure. Sea-water di- luted with 0.
. Carnegie Institution of Washington publication. 40 Papers from the Marine Biological Laboratory at Tortugas. In figure 6 the full line and open circles represent the rates in sea-water diluted with molecular dextrose, and the dotted line and black circles show the rates in sea-water diluted with distilled water. Table 6. Composition of the solution. s. w. = sea-water. d. distilled water. Relative rates of nerve-conduc- tion, that in natural sea- water being 100. Sea-water di- luted with dis- tilled water, thus corre- spondingly reducing osmo- tic pressure. Sea-water di- luted with molecular dex- trose, thus maintaining normal osmotic pressure of atmospheres. Natural sea-water, salinity P- ct 95 p. ct. s. p. ct. d. w. or 90 10 8S IS 80 20 75 25 71 29 70 30 60 40 SO 50 100 103 105 lOI 86 ' 70 SO 100 104 106 104 100 87 73 Figure 6 gives a graphic representation of the results stated in table 6, the ordinates giving the average rates of the pulsating rings, and the abscissae giving the relative concentration of the dissolved salts of the sea-water, that of normal sea-water being loo. Thus the ordinates of the full-line curve show the relative rates of conduction of the nerve-impulse when the sea-water is diluted with molecular dextrose, and the dotted curve shows the same for sea-water diluted with distilled water so as to reduce its. JO 6!) 70 60 SO 100 Relative Concentration of the Sea-water Solutions. Fig. 6. osmotic pressure in nearly the same ratio as the reduced concentration of the electrolytes. The practical coincidence of the curves for sea-water, diluted with distilled water and with molecular dextrose, shows that the phenomena in question are not due to variations in osmotic pressure, but to the varying concentrations of the electrolytes. Moreover, both these curves show that the most rapid rate of nerve- conduction is in diluted sea-water, wherein the electrolytes are only about. Please
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