1909.] Yeast-juice from Hexose and, Phosphate.. . 541 



Table XII. 



No. 



Normality. 



Grammes per 

 100 c.c. 



Specific 

 gravity. 



Weight of 

 water. 



Depression. 



Molecular 

 weight. 



1 



1-75 



15-13 



1-075 



92 -37 



o 



1-747 



177 



2 



99 



8-42 



1-042 



95-78 



0-932 



178 



3 



0-55 



4-68 



1 -022 



97 -52 



0-535 



169 -4 



4 



1 -65 



14 -21 



1 -063 



92 -09 



2 -153 



135 -5 



5 



0-97 



8-38 



1 -037 



95 -32. 



1 -300 



127 -7 



The formula C 6 Hio0 4 (P04H2)2 corresponds to a molecular weight of 340, 

 and the smaller formula to 1 70, whilst glycerophosphoric acid, CsHyC^PC^H^), 

 has a molecular weight of 172. Thus the value obtained, although low, was 

 much greater than that found for glycerophosphoric acid, which only differs 

 in composition from the smaller formula by two hydrogen atoms. 



The cane-sugar hydrolysis was carried out at 25° with semi-normal acid, 

 and the rate was compared with that found for semi-normal hydrochloric 

 and glycerophosphoric acids under similar conditions. 



Table XIII gives the figures found for the hexosephosphoric acid and 

 Table XIV those for the glycerophosphoric acid. Allowance has been made 

 in the tables for the rotation due to the acids themselves. Solutions of the 

 hexosephosphoric and glycerophosphoric acids of the same normality were 

 also kept by themselves under similar conditions for the same time, and no 

 alteration took place in their rotations. 



Table XIII. — Hexosephosphoric Acid. 



Time, in minutes. 



Rotation. 



X. 



A — x. 



Ex 10 4 







o 



+ 26 -83 







34 -88 





30 



25 -95 



0-88 



34 -00 



3 -700 



60 



24-98 



1 -85 



33 -03 



3 -945 



90 



24 -01 



2 -82 



32 -06 



4-069 



120 



23 -12 



3-71 



31 -17 



4-070 



160 



22 '05 



4-78 



30 -10 



4-001 



180 



21 -44 



5-39 



29 -47 



4 -051 



210 



20 -66 



6-17 



28 -71 



4 -026 



240 



19-95 



6-88 



28 -00 



3-976 



310 



18 -17 



8-66 



26 -22 



3 -999 



330 



17 -72 



9-11 



25-77 



3 -984 



360 



17 -06 



9-77 



25 -11 



3 -965 



390 



16 -32 



10 -51 



24 -37 



3-993 



420 



15 -70 



11 -13 



23 -75 



3-974 ■ 



00 



-8-05 



34 -88 















3-981 



