March. 1918 C. U. C. P. ALUMNI JOURNAL 45 



Thompson's Linseed Oil Emulsion. Slaked Lime for Opium Assay. — B. 



— F. R. J., IMew York. — We published G., New York, desires to know now to 



the recipe for this preparation in the slake the lime for the U. S. P. opium 



Journal for iNiovember, lyiO, page 2^ii. assay. Had our friend turned to page 



537 of the Phartnacopoeia he would have 



Antipyrine Incompatibility. — T. M. found the foUownig statement: 



v., New York, has received a prescrip- "Lime, Freshly Slaked. — To prepare 



tion calling for freshly slaked lime for the Opium z\ssay, 



Antipyrnie i-O drop upon a convenient quantity of lime 



Phenol 2.0 one-third its weight of water, cover it 



Syrup of raspberry 15.0 and allow it to stand until the lime is 



Water enough to make loo.o slaked and cooled." 



He wishes information concerning it. 



Ruddiman in his book on incompatibili- "Selenium Colloidal Electrique."— 



ties states that when aqueous solutions ^ q 3_^ ^e^ York.— According to 



of antipyrine and phenol are mixed, tur- Bourgeant and Czecsi {Rev. de Thera- 



bidity results and an oily liquid settles peutiqiie, through Schweiz. Wsch. f. 



to the bottom in a few hours. He sug- ^-/^^^^^ ^ Pharm. 51, 1913, 52) this name 



gests no remedy nor can we. In fact, we jg applied to a French preparation us- 



would hesitate about dispensing the pre- y^lly marketed under the name, "electro- 



scription. selenium." It is recommended as a can- 



cer cure. 



Magnesia Usta Gravis. — C. T. T., 



New York.— This is an old name for Ammoniated Tincture of Quinine.— 



heavy magnesia or magnesii oxidum p g j^ New York.— This is a prepara- 



ponderosum of The United States Phar- tj^j^ of tl-,e British Pharmacopoeia and 



macopoeia, th^ recipe is as follows : 



Quinine sulphate .... 20.0 grammes 



Solution of Iron and Manganese Pep- Ammonia water 100.00 mils 



tonate. — B. R. J., Nevir York, in mak- Alcohol (60%) 900.0 mils 



ing a batch of the iron and manganese Mix the ammonia water and the alco- 



peptonate solution of The National For- hoi, add the quinine sulphate and shake 



mulary, obtained a brownish precipitate until a practically clear solution results, 



on addition to the peptone solution of the Then set aside 3 days, after which filter 



solution of ferric oxychloride and of so- 



dium and manganese citrates. He de- "H. Acid." — J. R. H., New York. — 



sires to know how to remedy the trouble. According to Thorpe's Dictionary of 



We suspect that in "neutralizing" the Applied Chemistry, "H. Acid" is the 



peptone solution with sodium hydroxide trade name for amino-naphthol-disul- 



solution he overstepped the mark and phonic acid. CjoH^CNH,) (OH) 



that the precipitate was ferric hydroxide. fSO.H).,, in which the four side groups 



In that event he might be able to make are attached to carbon atoms i, 8. 3 and 



a clear solution by addition of a small ^ respectively. It is an important basic 



amount of citric acid. material in making azo dyes. 



