60 



der it evenly and distinctly damp and to maintain it so, after macer- 

 ating for six hours in a tightly covered container. Then pack it in 

 a cylindrical percolator and add enough of the menstruum to satu- 

 rate the powder and leave a stratum above it. When the liquid 

 begins to drop from the percolator, close the lower orifice, and, hav- 

 ing closely covered the percolator, macerate for forty-eight hours. 

 Then allow the percolation to proceed slowly, gradually adding 

 more menstruum until the drug is exhausted. Reserve the first 

 eight hundred and fifty mils of the percolate (unless otherwise speci- 

 fied in the formula) ; recover the alcohol from the remainder and 

 concentrate the residue to a soft extract at a temperature not ex- 

 ceeding 60°C. ; dissolve this in the reserved portion, mix thoroughly, 

 and finally add a sufficient quantity of the menstruum to obtain one 

 thousand mils or the volume determined by calculation or di- 

 rections. 



Type Process B. Moisten one thousand grams of the powdered 

 drug directed with a sufficient quantity of the prescribed Menstruum 

 I, to render it evenly and distinctly damp and to maintain it so 

 after maceration for six hours in a tightly covered container. Then 

 pack it in a cylindrical percolator, add the remainder of Menstruum 

 I, and when this has just disappeared from the surface, gradually 

 add : Menstruum II, constantly maintaining a stratum of liquid 

 above the drug. 



When the liquid begins to drop from the percolator, close the 

 lower orifice, and, having closely covered the percolator, macerate 

 for forty-eight hours, and then allow the percolation to proceed 

 slowly, gradually adding Menstruum II until the drug is exhausted. 

 Reserve the first eight hundred and fifty mils of the percolate (un- 

 less otherwise directed in the formula) ■ recover the alcohol from 

 the remainder and concentrate the residue to a soft extract at a 

 temperature not exceeding 60°C. ; dissolve this in the reserved 

 portion, mix thoroughly, and finally add a sufficient quantity of 

 Menstruum II to obtain one thousand 'mils, or the volume deter- 

 mined by calculation from assay. 



Type Process C. Di-^ide one thousand grams of the powdered 

 drug directed into three portions of five hundred grams, three 

 hundred grams, and two hundred grams, respectively. Moisten 

 the first portion of the drug (500 6ms.) with a sufficient quantity 



