1911.] The Permeability of the Yeast- Cell. 303 



Table IX. 



Initial liquid. 



Initial yeast. 



Pinal liquid. 



Final yeast. 



"Weight. 



CuS0 4 . 



Weight. 



CuS0 4 . 



Weight. 



CuS0 4 . 



Weight. 



CuS0 4 . 



grm. 



grm. 



grm. 



grm. 



grm. 



grm. 



grm. 



grm. 



100 



0-78 



100 





128 -4 



0-36 



71 -6 



0-43 



A remarkable degree of plasmolysis was observed and the shrunken cells 

 were of a pale green colour and solid appearance, the cytoplasm had 

 evidently entered into combination with the CuS0 4 and had been precipitated 

 thereby, so that the factor K in this case is much greater than unity, 

 namely, 336. When this yeast was added to sugar solution no fermentation 

 was produced. 



Sodium Phosphate. 



These experiments have been made with solutions of the di-sodium salt of 

 two concentrations, roughly 1/10 and 3/10 molar, and with water. 



Table X. 



No. 



Conditions. 





Yeast. 



Liquid. 



Initial. 



Pinal. 



Initial. 



Pinal. 



103 



Liquid containing 1 -42 grm./lOO c.c. 



Total 



50 -00 



50-34 



50 -50 



50 -16 





Na 2 HP0 4 , stood 20hrs. in cold store 



PA 



0-75 



0-76 



0-35 



0-38 



104 





Total 



50 -00 



49-91 



50 -50 



50 -59 







PA 



0-81 



0-87 



0-35 



0-36 



107 





Total 



100-00 



99 -90 



101 -30 



101 -40 







PA 



1-63 



1-64 



0-71 



0-71 



109 





Total 



100-00 



100-74 



101 -50 



100 -76 







PA 





1-55 



0-71 



0-63 



111 



Liquid containing 4 '16 grm./lOO c.c. 



Total 



100 -oo 



95 -50 



104 -00 



108 -50 





Na 2 HP0 4 



PA 



1 -63 



1-97 



2-08 



1 -80 



112 





Total . . , 



100 -oo 



96 -60 



104 -00 



107 -40 







PA 



1-59 



2-01 



2-08 



1-80 



105 



Water 



Total 



100-00 



102 -02 

 1 -49 



100 -oo 



97 -98 







1-43 







108 



Water 



Total 



50 -00 



53-16 



50 -00 



46-84 





PA 



0-81 



0-80 





o-oi 



114 



Water 



Total 



100 -oo 



107 -80 



100-00 



92 -20 







P2O5 



1 -53 



1-56 







