LABORATORY EXERCISES 



ANATOMY AND PHYSIOLOGY 



4 



(The abbreviation (Dem.) means that a demonstration will be 

 given by the instructor. ) 



i. STUDY OF A MATCH. 



Materials : Sulphur-matches, phosphorus, sulphur, lime-water, 

 bottle and stopper, tumbler, pieces of board. 



A. Phosphorus. 



1. Rub the end of a sulphur-match on your 



finger in the dark. What is the ap 

 pearance of the streak? 



2. Light a match by rubbing the tip on a 



rough surface. What is the color of the 

 flame at first? Describe the color and 

 smell of the fumes that first go off into 

 the air. (These fumes are called oxid 

 of phosphorus.) 



3. (Dem.) Observe the instructor while he 



cuts off a piece of phosphorus. (Caution! 



Phosphorus must never be handled with 



the fingers.) 



a. What are some of the physical prop- 

 erties (color, odor, hardness) of 

 phosphorus ? 



