256 -RHE—RHE 
_ + Formula for the preparation of the sulphate of rhubarb. 
- Boil for half an hour six pounds of coarsely powdered , 
_ — Chinese rhubarb, in-six gallons of water, acidulated with 
two and a half fluid ounces of sulphuric acid; strain the 
decoction, and submit the residue to a second. ebuilition 
ina like quantity of acidulated water—strain as before, 
and submit it again to a third ebullition. Unite the three 
tions, and add by smail portions, recently powdered, 
pure lime—constantly stirring it, to facilitate its action on 
the acid decoction. When the decoction has become 
ger ese deposits a red flocculent precipitate, 
_ and the fluid is changed from a yellow toa crimson colour; 
" the’precipitate is then to be separated by passing it through 
a linen cloth and dried—after which, reduce it to powder, 
and digest in three gallons of alcohol, at thirty-six degrees, 
in a water-bath, for several hours, at a moderate heat. 
Separate this solution from the calcareous precipitate, and 
distil off three-fourths of the alcohol—there then remains 
ipa 
©. 
089110) "PL “waned 
*MOoy 
Formule— — 
--# No.1. See Formula 2, of No. 185. 
OE 
No. 2. See Formula of No. 443. 
No. 3. R_ Pulvyeris Ipecacuanhe é 
Pulveris Rhei, aa Dj’ 
Make a powder, emetic. Stoerck. 
_ No. 4. KR Pulveris Rhei, Bs 
Magnesiz (ust.) 
ee Ole Anis, = gj 
For acidity in the : 
tte Me: So2B, Potassz Carbonatis, Sif 
eee 
a ee 
