TRANSACTIONS 



OF THE 



ROTAL SOCIETT OF EDINBURGH. 



VOL. IV. 



• '.'.^^_ /;-^,/„ -vi' 



EDINBURGH: 



PRINTED FOR T. CADELL JUN, AND W. DAVIES 

 (successors to MR CADELJl) IN THE STRAND, LONDON, 



AND 

 J. DICKSON, AND E. BALFOUR, EDINBURGH. 



MDCCXCVIII. 



