TRANSACTIONS 



( 





OK T li y. 



CAMBRIDGE 



PHILOSOPHICAL SOCIETY. 



Volume VIII. Part III. 



CAMBRIDGE: 



I'HIXTKIl .IT THE UNIVHRSITV PREUX; 



ANU btlLI) HV 



JOHN WILLIAM PARKER, WEST STRAND, LONDON; 



J. i I. .1. DKUillTON; AND MACMILLAN AND CO., CAMBRIDGE. 



M.OOOO.XLVII. 



