H. C. HAMPTON AND L. G. M. BAAS-BECKING 



643 



a = 44 mm. 



The reading error, 0.2 mm., gave the following result in the first K: 



138 29.2 0.178 297 x lO""* 



The deviations in K are therefore due to reading errors, and the re- 

 action follows the monomolecular line. 



We studied the influence of different amounts of sodium carbonate 

 with different 3 gm. lots of Ulva. We found 



Excess of alkali causes a marked decrease in reaction velocity in 

 subsequent repetitions of the reaction. Perhaps the enzyme is 

 destroyed by the carbonate. Therefore we tried to apply the formula 



dx n 



of Schmidt-Nielsen (shaking in activation of rennet) — = k{a — x)t 



dt 



in the modification given by Herzog 



K = 



V a — Va — X 

 t y/a (a - x) 



