PREFACE FOR THE LABORATORY MANUAL 5 



3. A statement of the results. 



4. A conclusion drawn from the results, when a con- 

 clusion is possible. 



It is essential that these notes are clearly and concisely 

 expressed and neatly kept. 



The development of this laboratory course could not 

 have been made possible except for the encouragement, 

 sympathetic interest, and faith of Mr. J. C. Hanna, to 

 whom we hereby acknowledge our indebtedness. 



