TO HIS 



ROYAL HIGHNESS 



PRINCE EDWARD 



As Heaven has inspired your ROYAL 

 HIGHNESS with such a love of ingenious 



O 



and useful arts, that you not only study their 

 theory, but have often condescended to 

 honour the professors of mechanical and 

 experimental philosophy with your pre- 

 sence and particular favour ; I am thereby 

 encouraged to lay myself and the following 

 work at your ROYAL HIGHNESSES feet ; 

 and at the same time beg leave to express 

 that veneration with which I am, 



SIR, 



Your ROYAL HIGHNESS'S 

 Most obliged, 



And most obedient, 

 Humble Servant, 



JAMES FERGUSON'. 



