THE ALUMNI JOURNAL 121 



made from the very best lemon oil obtainable, which strictly com- 

 plies with the U. S. P. test for aldelyde as citral. 



The following formulae will serve as a standard : 

 Spiritus (not tincture) Limonis — 



Oleum corticis citri lOO.O c.c. 



Spts vini rectif. absolut. qsad i,OOO.o cc. 



This makes the ideal lemon spts always of uniform strength 

 when strictly U. S. P. oil is employed. 



Coming back to the liquor magnesii citrat. the solution of mag- 

 nesium carbonate citric acid and sugar is completed and cooled, add 

 for each bottle of magnesia i c.c. of the foregoing lemon spts and 

 enough cold water to make 360.0 c.c. solution. 



Filter the whole solution through a double ribbed (white) filter 

 paper returning . the first filtrate three or four times until a per- 

 fectly clear solution is obtained. 



Lastly, when all bottles are filled add to each bottle the re- 

 quired amount of pure crystalized potassium bicarbonate. Avoid 

 the use of ready prepared K H C O 3 tablets, as I have noted a 

 white sediment resulting either from impurities in the tablets or 

 failure to completely decompose in solution. 



All fellow pharmacists are invited to experiment with the following 

 formula, and if found to be an improvement on the present U. S. P. 

 formula to recommend their findings to the delegates of our college 

 on the next U. S. P. Revision Committee. 



Formula for (10) bottles. 



Liquor Magnesii Citratis. 



Magnesiium Carbonas 150.0 gm. 



Acidum Citricium 390.o 



Saccharum,U. S. P 600.0 " 



Spiriti Limonis lo.o c. c. 



Kalium Bicarbonicum 25.0 gm. 



Aquae Distillatae qs. ad 3600.0 c. c. 



Respectfully submitted, 



Jac. B. Zimmermann, Phar. D. 



(N. Y. C. P., '05.) 



