the pleasure of the pursuit is a sufficient 

 reward for the labour."* 



It may be due to the author of the ad- 

 mirable " Conversations on Chemistry," to 

 mention, that the title of the present vo- 

 lume was chosen, because it was the only 

 one that seemed to be adapted to the 

 nature of the subject, which had not been 

 appropriated by preceding writers. 



* " Letters for Literary Ladies," 3d edit, page 60. 



A 3 



