Devices and Helps in Nature Study. 193 



DEVICES AND HELPS IN NATURE STUDY. 

 BOOKS OF REFERENCE. 



The Weather-chart. 



The weather-chart is a very useful device now to be found 

 in many schools. It consists of a large card, in the centre 

 of which is a square divided into 49 smaller squares, 7 on 

 each side, i.e., 7X7. These smaller squares are two inches 

 each way. 



Down the first column of squares the days of the week 

 are written. Then for each day of the month a circle of 

 colored paper is pasted in the square representing that day. 

 In the Chatham school the pupils selected red for clear and 

 warm, blue for clear and cold, light gray for cloudy, and 

 dark gray for stormy. 



Observations are ma<de at 12 M., and the direction of the 

 wind each day is indicated by an arrow cut out of white 

 paper and mounted across the colored circle. Thus a blue 

 circle having an arrow pointing upward indicates that at 

 .noon of that day the wind was in the south and the day 

 was cold and clear. It is necessary to have 42 squares in 

 which to represent the days of the month, since the month 

 begins on different days of the week. Pupils become at 

 once very much interested in these observations. The record 

 is kept, and at the close of each month the card is put up 

 above the blackboard and a new card is put up for the new 

 month. The names of days and an appropriate heading are 

 printed by some pupil especially skilled in that line of work, 

 while the four colors are placed just below the square to 

 explain their use above. 



