30 GRAVITATION. 



does in the air. I am now going to let it 

 loose, and you must watch to see how rapidly 

 it falls. There ! [letting the gold loose] there 

 it is, falling as gold should fall. 



I am sorry to see our time for parting is 

 drawing so near. As we proceed, I intend to 

 write upon the board behind me certain words 

 so as to recall to your minds what we have 

 already examined ; and I put the word FORCES 

 as a heading, and I will then add beneath the 

 names of the special forces according to the 

 order in which we consider them ; and although 

 I fear that I have not sufficiently pointed out 

 to you the more important circumstances con- 

 nected with this force of GRAVITATION, espe- 

 cially the law which governs its attraction (for 

 which, I think, I must take up a little time at 

 our next meeting), still I will put that word on 

 the board, and hope you will now remember 

 that we have in some degree considered the 

 force of gravitation that force which causes 

 all bodies to attract each other when they are 

 at sensible distances apart, and tends to draw 

 them together 



