Am.  Jour.  Pharm.  1 
Dec.  1875.  J 
Barbadoes  and  Soco trine  Aloes, 
I. 
II. 
precipitate  which  could  not  be  made  to  crystallize  from  either  alcohol, 
or  ether.  After  drying  in  the  air  it  gave  off  mere  traces  of  water  in 
vacuo. 
•2196  gram  gave  '4755  of  CO2,  and  '1063  of  water. 
•2732  gram  gave  '5874  of  CO2,  and  •1328  HgO. 
Percentages, 
I.  II  Mean. 
C  59.05  58-63  58-84 
H  5*37  5*39  5'38 
Acetyl-harhalo'in. — Prepared  in  the  same  way  is  a  yellowish  white 
curdy  substance,  the  analysis  of  which  gave  the  following  numbers  : 
I.  '2774  gram  gave  '5976  of  COg,  and  '1334  of  H2O. 
II.  -2150  gram  gave  '4630  of  CO2,  and  -1064  of  H2O. 
Percentages 
I.  II.  Mean. 
c         58-55         5873  58-63 
H  5*34  5-49  5-41 
Leaving  out  of  consideration  the  question  of  the  formula  deducible 
from  these  figures,  I  propose  now  to  compare  them  with  the  results 
which  have  been  obtained  by  different  experimenters  in  operating  upon 
the  aloin  of  Barbadoes  aloes. 
Barbaloin. 
(dried  in  vacuo. 
(Stenhouse  (average.) 
59.31  per  cent. 
H         5-88  " 
Br  omoharh  aloin . 
Stenhouse  (average.) 
Tilden.* 
C  35.48 
34.66 
H  278 
3*04 
Br  51-97 
41-96 
Chlor  oh  arh  aloin . 
Tilden  (1872.) 
C  45-17 
H  3-70 
CI  25-13 
Acetyl-harhaloin . 
(average.) 
C  5863 
H  5-41 
Jjanaloin. 
{dried  in  vacuo.) 
Tilden  (average.)  Fluckiger. 
59-49  59*2 
5-80  5-9 
Bromozanaloin. 
Tilden.*  Tilden. 
34-67 
2-95 
42-09 
Chloro'z.analoin. 
Tilden  (1875.) 
34.05 
2-65 
43-06 
25-04 
Acetyl-%analoin, 
(average.) 
58-84 
5-38 
^  Both  prepared  at  the  same  time  and  in  the  same  way,  by  pouring  bromine  water 
into  solution  of  the  aloin. 
