. Carnegie Institution of Washington publication. V_ V_ _/v_ yv_ JV_ _/v. JV yv i\_ ^v_ 21" °5 V^^ yv_ y^^ JV ^'X^ V V JX^ yv yx^ JX. JV JV \%' \b°.% yv_ yv_ yv. jv_ IBM ° 8 yx^ yv_. Record No. 2.—A Cassiopea xamachana cooled from ° to ° C. and then warmed to ° C. the square of the departure of the temperature from its optimum of 33°. Thus a change in temperature above or below the optimum appears to reduce the rate of pulsation in proportion to the square of the change. For example, if cooling 1° C. produces a loss of rate of i per minute, a cooling of 2
. Carnegie Institution of Washington publication. V_ V_ _/v_ yv_ JV_ _/v. JV yv i\_ ^v_ 21" °5 V^^ yv_ y^^ JV ^'X^ V V JX^ yv yx^ JX. JV JV \%' \b°.% yv_ yv_ yv. jv_ IBM ° 8 yx^ yv_. Record No. 2.—A Cassiopea xamachana cooled from ° to ° C. and then warmed to ° C. the square of the departure of the temperature from its optimum of 33°. Thus a change in temperature above or below the optimum appears to reduce the rate of pulsation in proportion to the square of the change. For example, if cooling 1° C. produces a loss of rate of i per minute, a cooling of 2° from the optimum will produce a loss of 4, and for 3** the loss will be about 9, etc. Thus if X be the departure of temperature from the optimum of 33° (for example at 30° or at 36°, x = 3), and if y be the loss in rate (for example, if the rate has declined from 34 to 30, 3' = 4)» then in cooling y = , and in heating y = It seems that the loss of rate in heating is nearly 8 times as rapid as in cooling. Moreover, when the medusa has lost all movement through being heated, its muscles are relaxed and recovery rarely occurs, even if the medusa be then cooled to a normal temperature. If, however, the medusa be cooled to a standstill, the muscles still exhibit a decided tonus, some shrinkage occurs, and the slime congeals into a gelatinous mass. The falling-off in rate that is observed when the medusa is either cooled or heated from its optimum temperature appears not to be a simple chemical reaction, for it is more rapid than can be represented by the equation. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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Keywords: ., bookauthorcarnegie, bookcentury1900, bookdecade1910, bookyear1914
