MODELS AND MAPS 



133 



the midday position of the sun. A few days' observation by the 

 shadow method will show that this gives a constant direction, one 

 which it is as well to mark on the plans, and to adopt a name for. 

 The habit of keeping the plans with their north side upper- 

 most should be in every way encouraged, and then the idea 

 of other compass points can be brought out. The compass 

 itself can be used as supplementary to the observation of the sun 

 itself. 



FIG. 35. A plane-table. 1 



Finally, the necessity for the employment of conventional 

 symbols will become apparent, and a set of symbols will naturally 

 be selected out of those proposed and adopted. In all exercises 

 of this kind it is obvious that the use of squared paper should 

 be encouraged in every way, both for saving of time and also 

 to encourage accuracy and clearness in work. It will evidently 



1 From An Introduction tc Practical Geography (Simmons and Richardson), by permission 

 of Messrs. Macmillan & Co. Ltd. 



