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NA TURE-STUD Y REVIEW 



!6:9-Dec.,1910 



resume the study after the lapse of a month, more or less. The 

 records may be made in sentences or in prescribed tables, each 

 pupil who can write making and keeping his own, or they may 

 be scheduled on the blackboard or wall chart as cooperatively 

 agreed upon. 



Equipment in the way of instruments for measuring tem- 

 perature, pressure, etc., will vary in different schools in number 

 as well as in value, in cost from two or three dollars to as many 

 hundreds, but good work may be done in the absence of any 

 instrumental equipment; and indeed whether there be instru- 

 ments or not the inexperienced observers should express their 

 observations in "adjectives" rather than in exact numerical 

 relations. The terms "very cold," "cold," "cool," "temperate," 

 "warm," etc., used properly by the child to express his sensations 

 of temperature are more educative than if he stepped to a ther- 

 mometer and reported the "standing of the mercury." It is an 

 important pedagogical rule that he should learn the significance 

 of readings upon the various instruments by approaching them 

 with judgments expressed in "adjectives" and later by estimated 

 readings formed directly from observation of the phenomena. 



Experience has shown that a class of children in the primary 

 grade has enjoyably and profitably used the following schedule, 

 although many teachers might prefer it in simpler form for 



