British Pharmacopoeia? Four grains to the ounce. 



What change has been made in the name of Spiri- 

 tus Lavandulae Compositus U. S. P. 1870? It was 

 changed to Tinctura Lavandulae Composita. 



Why is HC1 used in making purified animal char- 

 coal? To dissolve out the calcium salts. 



What acid does Cream of Tartar contain ? Acidum 

 Tartaricum. 



What is meant by (the signa) to a prescription? 

 The direction to the nurse or patient. 



W^hat Volatile Oil is made by destructive distilla- 

 tion? Oil of Amber. 



From what is Balsam Tolu obtained? Myroxylon 

 Toluifera. 



From what is Balsam Peru obtained? Myroxylon 

 Pereirae. 



What is " Phenol?" Carbolic Acid. 



From what does Formic Acid derive its name ? 

 " Formica Rufa," from which it was first obtained. 



What is the chemical reaction of the Arsenious 

 salts? Acid. 



What is Ebullition, or boiling? A violent agita- 

 tion in a liquid produced when it is heated from the 

 fluid to the gaseous condition. The heat acts first 

 on that portion of the liquid resting against the 

 heated surface, converting a portion into steam, 

 which rises in the form of bubbles that break on the 

 surface of the liquid. 



What is meant by the boiling point of a liquid? 

 The temperature at which it boils. Each liquid has 

 its specific boiling point as well as its specific weight. 

 Liquids evaporate more or less at all temperatures, 

 hence there seems to be no specfiic evaporating 

 points, but there is a specific point where ebullition 

 commences. 



What is meant by Spontaneous Evaporation? 



51 



