TRANSACTIONS 



CAMBRIDGE 



PHILOSOPHICAL SOCIETY. 



ESTABLISHED November 15, 1819. 



VOLUME THE SEVENTH. 



CAMBRIDGE: 



PRINTED AT THE UNIVERSITY PRESS; 



AMD BOLD BY 



JOHN WILLIAM PARKER, WEST STRAND, LONDON; 



J. & J. J. DEIGHTON ; AND T. STEVENSON, CAMBRIDGE. 



MDCCC.XLII. 



