Effect of Different Temperatures on the Medusa Cassiopea. 37 



Curve B was plotted from data obtained with a ring whose outside 

 diameter =75 mm.; inside diameter = 30 mm. Its form is essentially 

 that of A, but it is less regular. This must be attributed to experimental 

 errors, as my apparatus for changing the temperature uniformly was not 

 as perfect as in the experiment from which A was plotted, and the ther- 

 mometer used was only graduated to degrees instead of o.i degree. 



So long as the temperature- velocity curve is a straight line, the 

 value of Qio will not be constant for all io° temperature-intervals, but 

 will gradiially become less and less, the higher the temperature. This is 

 not the case (as a rule) for temperature-reaction velocity curves. Q^^ 



