XYII. FROST 



Material. — Have the pupils bring pieces of board or other things cov- 

 ered with frost. Meet tlie pupils out of doors before school, and call their 

 attention to the forms of frost on the shady side of the schoolhouse. Use 

 a magnifying glass if possible. While the pupils are looking recall to them 

 how water freezes and how snowflakes look. 



Observation. — On what do you find frost? Is 

 there any on the bare ground ? On what does it 

 show the most plainly ? How does the frost look at 

 a distance ? 



Is the frost in a white coating like paint, in grains 

 like flour, in needles like ice, or in stars and wheels 

 like snow ? Look for flat particles of frost. How 

 many straight sides has one of the particles ? Do 

 you find any frost stars, any rosettes or other 

 figures ? 



Do the frost particles stand on end or lie flat on 

 their sides ? What is the shape of the particles that 

 glitter in the sunlight ? Does frost on the grass glit- 

 ter as much as frost on a board or fence ? Do you 

 find a reason for this ? 



Drawing and Composition. — Write a description of 

 the frost that you observed. Illustrate your work 

 with pictures of some of the frost shapes that you 

 saw, 



83 



