ADVERTISEMENT 



THIRD EDITION 



Ihis Book, which was begun as an amusement for 

 a child, has imperceptibly become an amusement 

 to myself, and, in the progress of investigation, 

 1 have overstepped my original plan. It is now, 

 therefore, calculated for more advanced years j and 

 though I am not sensible of any difficulties in lan- 

 guage which are not sufficiently explained, yet some 

 facts may require more thought and reflection than 

 the gaiety of youth, with its amusements, may stay 

 to contemplate. If this should prove to be the case, 

 they may be passed by, and the classification only at- 

 tended to. 



