PHILOSOPHICAL 



TRANSACTIONS 



OF THE 



ROYAL SOCIETY 



OF 



LONDON. 



FOR THE YEAR MDCCC. 



PART I. 



LONDON, 



PRINTED BV W. BULMER AND CO. CLEVELAND-ROW, ST. JAMESES ; 



AND SOLD BY PETER ELMSLY, 



PRINTER TO THE ROYAL SOCIETY. 



MDCCC. 



