6G 



Make Extractum Gentianae — Extract of Gentian 



Gentian in No. 20 powder 50.0 Gm. 



"Water, a sufficient quantity- 

 Moisten the powder with sufficient water and allow it to stand 

 (macerate) for 24 hours. Then pack it in a cylindrical percolator 

 and gradually pour water upon it until the drug is exhausted. Re- 

 duce the liquid to three-fourths of its bulk by boiling and strain ; 

 then by means of a water bath, evaporate to a pilular consistency. 



Extractum Rhei — Extract of Rhubarb 



Rhubarb, in No. 40 Powder 100.0 Gm. 



Magnesium Oxide 5.0 Gm. 



Starch, dried at 100°C. 



Alcohol, 



Water, each, a sufficient quantity 



to make 50.0 Gm. 



Moisten the drug with sufficient of a mixture of four volumes 

 of alcohol to one volume of water, pack it in a cylindrical percolator 

 and add enough of the menstruum to saturate the powder and leave 

 a stratum above it. When the liquid begins to drop from the per- 

 colator close the lower orifice, and, having closely covered the perco- 

 lator, macerate for forty-eight hours. Then allow the percolation 

 to proceed slowly, gradually adding menstruum of the same propor- 

 tion of alcohol and water as before until the drug is exhausted. 

 Recover the alcohol from the percolate by distillation at as low a 

 temperature as practicable, and continue distillation until a resi- 

 due of syrupy consistency remains in the still. Transfer this to a 

 shallow dish, rinse the still with a little warm menstruum, add the 

 rinsings to the residue in the dish, and evaporate the mixture to 

 dryness, with frequent stirring, at a temperature not exceeding 

 70° C. Weigh the dry extract and add the magnesium oxide and 

 sufficient of the dried starch to make the product weigh fifty grams. 



Reduce the mixture to a fine powder, mix thoroughly, pass the 

 extract through a fine sieve, transfer it to small, wide-mouthed bot- 

 tles and stopper them tightly. 



