40 



•(/) Are they strewn evenly over the field? over the district? 

 {g) Find specimens of rocks which are badly decomposed, and ob- 

 serve the nature of the residue. 



3. In a Quarry or River-bank. 



[a) What is the composition of the rock? 



(b) Are the rocks in layers? Are they horizontal? 



(c) Are the layers (strata) composed of the same material? Are they 

 <of equal thickness? Try aiid explain the variations. 



[d) Measure the Dip, and strike off the rocks. 

 (c) Are their fossils in the rocks? 



{() Examine the soft material lying above the rock, and determine 

 how it has been formed. 



LXVIII. The Surface Features of the District. 



(From Jackman's Nature Study.) 



1. In looking over the country about you, can you tell what has 

 been the most important agent in its formation? 



2. Is the same force still at work? Is it working rapidly or slowly? 



3. What other forces have left their impress upon the country? Are 

 they still .acting? 



4. Are there any evidences as to whether these forces ever worked 

 more rapidly or more powerfully than now? 



5. Can you find any place where the land is being torn down? What 

 is doing it? What becomes of the material when torn away? 



6. Are there any forces which oppose the tearing away? 



LXIX. The Heavens at Night. 



1. Determine the position of the Great Bear. Cassiopeia, Vega, and 

 Capella, with reference to the North Star or Polaris. Observe their ap- 

 parent rotation about Polaris once every day. 



2. Determine the time of rotation of the earth on its axis. Describe 

 the method. 



3. Locate the position of: Taurus (Bull), Perseus, Orion, Leo, 

 Virg-o Aries (Ram), Pegasus, and Aquarius,— Northern Crown, Northern 

 Cross'. Scorpio, with reference to the Great Bear? Explain why we can- 

 not see Orion and Leo in a summer evening. If possible, locate the 

 position of the constellations in early evening, at midnight, and in early 

 morning, sav 3.30. Note the changes. 



4. Whv does the Great Bear appear in early evening high up m 

 Mav and low down in the Northern sky in October? 



