. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 320 T. WILLIAM BUCHANAN and the data of Hyman (1929), constitute convincing evidence that the rau- of oxygen consumption of Planaria in natural water is inde- pendent of the oxygen tension over a wide range. 1 i-mv 1 also shows that in distilled water after four to six hours the rate of oxygen consumption is sub-normal and remains fairly constant UM \\rrn oxygen concentrations of and cc. per 50 40 30 20 10. 10 12 14 16 18 20 FIG. 2. Rate of disintegration of Planaria dorolocephula in distilled water with di
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 320 T. WILLIAM BUCHANAN and the data of Hyman (1929), constitute convincing evidence that the rau- of oxygen consumption of Planaria in natural water is inde- pendent of the oxygen tension over a wide range. 1 i-mv 1 also shows that in distilled water after four to six hours the rate of oxygen consumption is sub-normal and remains fairly constant UM \\rrn oxygen concentrations of and cc. per 50 40 30 20 10. 10 12 14 16 18 20 FIG. 2. Rate of disintegration of Planaria dorolocephula in distilled water with different oxygen content. Ten animals in 500 cc. distilled water in each case. Room temperature. Abscissa? represent hours; ordinates are derived from arbitral} values assigned to portion of animals alive at each observation, , 50 indicates that all 10 within a flask are alive; 40 indicates that some have partially disintegrated. .1 and B and a and b represent two different experiments. In A the oxygen concen- tration of the distilled water was cc. per liter; in II the oxygen concentration was cc. per liter. In a the oxygen concentration was cc. per liter; in b the oxygen concentration was cc. per liter. It increases as the oxygen concentration is further increased, but is In-low that in tap water until the oxygen tension is increased beyond an apparent et wren these results for distilled water and those of I less (192*') and those given in an earlier paper by the writer (Buchanan,' \'>2'>in. The depressive action of distilled water shown here arises from the fact that tin animals \\c-re prr-e.\ posed, after washing with distilled water, from four to six h'uir-, ilien washed siphoning distilled water through the flasks for several minutes, then si-a|i-d in drilled water for two hours, thus bringing the total exposure to dis- tilled v of ->i\ and eight hours, in large volumes. The earlier results I1'-"' and tin •-,.• ..| I [ess (1929
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
