moved all the Oxygen from a confined portion of 

 air? Nitrogen. 



What is the chemical formula of Ammonium? 

 NH 4 . 



What is the source of the Ammonium Salts? The 

 ammoniacal liquor of gas works. 



What are Anthelmintics? Medicines which de- 

 stroy worms, or expel them from the bowels. 



How much phosphorus does Oleum Phosphora- 

 tum contain? One per cent. 



What is meant by Posology? That branch of 

 medicine that treats of doses. 



What is the cause of the precipitation which some- 

 times occurs in making aromatic spirit of ammonia? 

 This is due to the use of effloresced ammonium car- 

 bonate, which contains more than the proper quan- 

 tity of bicarbonate. 



What percentage by weight is contained in aqua 

 ammoniac, U. S. P.? Ten per cent. 



What is the object in keeping lime water upon un- 

 dissolved lime? To insure a saturated solution. 



What are the characteristics of alkaline earths? 



They are bivalent, form basic hydrates, and insol- 

 uble carbonates, phosphates and arseniates. 



What per cent, of water of crystallization does 

 alumen contain? 45.57 per cent. 



What is meant by Volume? The space occupied 

 by a certain amount of matter. 



Is Ferri Sulphas a Ferrous or Ferric Salt. 



Ferrous. 



Is Ferri Phosphas a Ferrous or Ferric Salt? 



Ferric. 



To what class of oils does Cacoa Butter belong? 



Fixed Oils. 



From what is Oleum Morrhuse obtained? From 

 the fresh livers of Gadus Morrhua. 



