DR. JOHN STENHOUSE ON VEGETABLE PRODUCTS FROM INDIA. 
145 
Datiscine prepared from its alcoholic solution hy the addition of IVater. 
III. 0”2045 giTti. gave 0'4715 gnu. CO 2 and 0’0665 grrn. HO. 
IV. 0*3680 grrn. gave O’S.'iOS grrn. CO 2 and 0*1245 grm. HO. 
The per-centage results calculated fi-om these analyses agi’ee very closely with the 
formula deduced from the analyses of the lead salt, as shown in the following Table : — 
Required. 
Found. 
I. 
II. 
III. 
IV. 
€30= 180 62-94 
Hio= 10 3-49 
Oi2= 96 33-57 
62-89 
3-58 
62-90 
3-70 
62-88 
3-61 
63-03 
3-76 
Analysis of Datiscine dried in a Liebig’s drying tube. 
A. Datiscine crystallized out of alcohol. 
I. 0*3890 grm. gave 0*7815 grm. CO 2 and 0*1780 grm. HO. 
II. 0*3395 grm. gave 0*6770 grin. COg and 0*1585 grm. HO. 
B. Datiscine crystallized out of alcohol from another preparation. 
I. 0*2785 grm. gave 0*5595 grm. CO 2 and 0*1315 grm. HO. 
II. 0*2905 grm. gave 0*5830 grm. CO 2 and 0*1385 grm. HO. 
C. Datiscine prepared with gelatine and out of alcohol. 
0*4145 grm. gave 0*8355 grm. CO 2 and 0*1925 grm. HO. 
D. Datiscine separated from its alcoholic solution by the addition of water. 
I. 0*1580 grm. gave 0*3135 grm. CO 2 and 0*0770 grm. HO. 
II. 0*1980 grm. gave 0*3955 grm. CO 2 and 0*0925 grm. HO. 
E. Datiscine precipitated from its potash solution by the addition of acetic acid. 
0*2985 grm. gave 0*5940 grm. CO 2 and 0*1375 grm. HO. 
The substance analysed in A. contained 0*3 to 0*4 per cent, of ash ; that in B. 0 2 
to 0*25 per cent. ; and that in C. 0*12 per cent. No allowance, however, was made 
for these amounts of ash in calculating* the following* numbers. 
The datiscine used for the analyses D. and E. did not contain any appreciable 
quantity of ash. 
The following are ihe per-centage numbers calculated from the above analyses: — 
A. 
B. 
c. 
D. 
E. 
I. 
II. 
I. 
II. 
I. 
II. 
C 
54-79 
54-38 
54-79 
54-73 
54-97 
54-11 
54-48 
54-27 
H 
n 
5-08 
5-19 
5-25 
5-29 
5-16 
5-41 
5-19 
6-12 
