TO 
HIS ROYAL HIGHNESS 
THE DUKE OF SUSSEX, K.G. 
g)’C. fyc. fyc. fyc. 
PRESIDENT OF THE ROYAL SOCIETY, 
WHOSE PATRONAGE, EVER LIBERALLY BESTOWED 
ON THE CULTIVATION OF SCIENCE IN ALL ITS BRANCHES, 
HAS BEEN ESPECIALLY EXTENDED 
TO THE PRESENT WORK, 
THE FOLLOWING PAGES 
ARE GRATEFULLY AND RESPECTFULLY DEDICATED 
BY 
HIS ROYAL HIGHNESS’S 
OBLIGED AND HUMBLE SERVANT, 
THE AUTHOR. 
