W. A. Davis, A. J. Daish and G. C. Sawyer 323 



to nearly 2 litres. Solid sodium carbonate added to precipitate the 

 lead exactly and solution made to 2000 cc. = A. 



Time 



£^8 



H a 



10 a.m. 

 4 p.m. 



11 p.m. 

 4 a.m. 

 6 a.m.* 



67-20 

 43-86 

 38-44 

 52-64 



35-57 

 24-69 

 20-32 

 29-29 



102-77 

 68-55 

 58-76 

 81-93 







O 



8? 



Invertase 

 inversion 



Citric 

 inversion 



43-30 23-96 67-26 25 cc.5 



10 oc. 



20 cc. 

 20 oc. 

 15 cc. 



•o -e 



i +0-636 



+ 0-380 

 + 0-471 

 + 0-595 

 + 0-277 



■_ a 

 j^ a 



0-2836 

 0-3288 

 0-3045 



0-3982 

 0-3595 



+ 0-090 

 + 0-062 



0-3481 

 0-4012 

 0-3637 



_3 



gg 



+ 0-097; 0-0186 

 + 0-069 0-0117 



+ 0-055 

 + 0-124 



0-0079 

 00134 



+ 0-048 0-0113 



a 



it 



170 cc. 

 180 cc. 

 170 cc. 

 ISOcc. 

 180 cc. 



* In the 6 a.m. analysis, 300 cc. of A were treated with solid sodium carbonate and 

 made up to 500 cc. {=B). The polarimetric data therefoie refer to solution B. 



Mangold Mid-ribs. September lOth-llth, 1912. 



Extract evaporated in vacuo and made up to 100 cc. 80 cc. of the 

 100 cc. treated with basic lead acetate, filtered and washed to 500 cc. 

 = Solution A. 150 cc. of Solution A deprived of lead by solid sodium 

 carbonate and made up to 200 cc. = Solution B. 



Series III. Mangold Leaves. October llth-12th, 1912. 



Extract evaporated in vacuo and made up to 500 cc. 440 cc. of 

 the 500 were treated with basic lead acetate, and the precipitate washed 



