EXERCISE 1 (Continued) 



1. Give an account of what was done, either by the instructor 

 or by you, in carrying out the experiment. Be careful to omit 

 nothing that might in any way influence the result of the 

 experiment. Make it clear enough so that an absent classmate 

 would be able to perform the experiment at a later time with 

 no other guide, than your notes. Illustrate by sketches if it 

 .will assist yo;a. , 



2. Whatf results did you observe? State the facts observed, 

 witriout your opin-ions. Make the statement as definite as pos- 

 sible. When the results can be expressed in figures (as in 

 Exercise 3) these figures should be given. 



3. State your conclusions. What have you learned from the 

 experiment? What is your explanation of the meaning of the 

 observed results? What are the reasons which convince you 

 that your explanation is correct? What further question or 

 what additional experiment does it suggest? 



[2] 



