SUGGESTIONS TO TEACHERS 11 



free, on application to the senator or representative from 

 the district. 



Another kind of work which may be included under labo- 

 ratory exercises, is the observation of industries carried on 

 in the town or city. Even if pupil and teacher do not under- 

 stand perfectly all operations viewed in the paper mill, thread 

 or cloth factory, dye works, foundry, machine shop, or other 

 manufactory, they will see much that can be used in class 

 to illustrate and apply the principles upon which those 

 industries depend. Application from the principal of a 

 school will usually gain permission for a small group of pupils, 

 accompanied by the teacher, to visit some of the shops in the 

 vicinity of the school. If there are several divisions of the 

 class, each division might study a different industry. Each 

 would learn something of value, though not all the same 

 thing^ 



Field work and photographs can be employed to supple- 

 ment the chapters on the surface features of the earth; 

 the collection and recognition of minerals and rocks will 

 add to the interest of some chapters which have little 

 laboratory work. Observation of living things will bring 

 a new interest to outdoor life. In fact, anything which 

 encourages comparison and observation of details is an 

 aid to mental development as well as an assistance in sci- 

 entific training. 



