trafton] OUTLINE OF NATURE-STUDY 167 



Application — 



Have the children observe at home and elsewhere a number of stringed 

 instruments, piano, violin, guitar, banjo, mandolin, and determine which 

 of the above means are used in each instrument. 

 Materials — 



A variety of strings used on string instruments, wires of different diameters, 

 and different materials, ordinary strings of various sizes; a box from 2 to 3 

 feet long across which the strings and wires may be stretched; bricks or 

 other weights which may be attached to the strings to vary the tension. 



ENEMIES OF FORESTS 



Eighth Grade — Spring 

 Child's Problem — 



What are the chief enemies of forests? 

 Outline of Development — 



1 . Fires. 



2. Reckless lumbering. 



3. Grazing. 



4. Insects and fungi. 



5. Wind. 

 Application — 



Ask the children to watch the papers for references to destruction of forests 

 especially by fires, to cut out the clippings and bring them to school, where 

 they may be kept on a bulletin board. 

 Materials — 



Pictures illustrating forest destruction by the agencies named above; speci- 

 mens of insects and fungi found on trees. 



The Midland Schools Teachers' Agency 



DES MOINES, IOWA 



Secures positions for good teachers in every state west of the Mississippi 

 river. During the last ten years, it has won the confidence of teachers 

 and employing officers by its conservative and reliable methods. The 

 most liberal contract offered. Write to-day for plans. 



C. R. SCROGGIE, Proprietor and Manager. 



