METHOD OF EXPEEIMENT 



It has been the purpose of the author so to state each 

 of the following exercises as to admit of its performance 

 by the pupil with a minimum amount of direction from 

 the teacher. Most of the exercises should be thus per- 

 formed by each pupil individually, or by two pupils to- 

 gether; but of course the teacher may select as many as 

 desired for performance as demonstrations before the class. 



It is essential that each pupil make a suitable record of 

 all exercises performed, in a carefully prepared notebook. 

 It is recommended that a separate-leaf notebook be used 

 for this purpose, as this makes possible the inspection of 

 one set of exercises without handUng the entire books, 

 and permits the rewriting of unsatisfactory work without 

 disturbing the arrangement of the book. 



It is generally agreed, too, that the book should consist 

 of original reports made at the time of experiment, and not 

 of matter copied from original rough drafts. 



Frequent examination of all laboratory notes by the 

 teacher is also essential to good work, and the proper status 

 of the notebook work can be secured only by giving it a 

 definite proportion in the marking of the pupil's work. 

 A rubber stamp with the word ''Approved" and the in- 

 structor's name may be obtained of any stationer at small 

 expense and will faciUtate the work of correction greatly. 

 Neatness as well as accuracy and adequacy of report 



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