0 7P a/ 
Xo * 1 
M 
, . f T 1 
PHILOSOPHICAL 
TRANSACTIONS, 
OF THE 
ROYAL SOCIETY 
OF 
LONDON. 
FOR THE YEAR MDCCCH. 
PART I. 
LONDON, 
PRINTED BY W. BULMER AND CO. CLEVEL AND-ROW, ST. JAMESES ; 
AND SOLD BY G. AND W. NICOL, PALL-MALL, BOOKSELLERS TO HIS MAJESTY, 
AND PRINTERS TO THE ROYAL SOCIETY, 
MDCCCII. 
