TRANSACTIONS 



OF THE 



ROTAL SOCIETT OF EDINBURGH. 



VOL. IV. 



EDINBURGH: 



PRINTED FOR T. CADELL JUN. AND W. DAVIES 

 (successors to MR CADELl) in the STRAND, LONDON, 



' -, AND 



J. DICKSON, AND E. BALFOURj EDINBURGH. 



Mnccxcviii. 



