PI 



TO ALL THOSE, 



WITH WHOM THE LOVE OF SCIENCE IS A PASSION, 

 INDEPENDENT OF PECUNIARY GAIN; 



WHO HAVE SUFFICIENT ZEAL TO PURSUE IT 

 THROUGH ALLOTS INTRICACIES, 



AND 

 SUFFICIENT PATIENCE TO SURMOUNT ITS DIFFICULTIES 



TO ALL THOSE 



WHO PREFER TRUTH TO A SPLENDID EQUIPAGE 

 OR LUXURIOUS ENTERTAINMENTS: 



foHotinng Dagre are, 



WITH ALL POSSIBLE RESPECT, 



BY THEIR SINCERE FRIEND 



AND MOST ZEALOUS ADMIRER, 

 AND VERY HUMBLE 



AND OBEDIENT SERVANT, 



THE AUTHOR. 



Hath, December 15th 1819. 



M 



