Accepted for publication, November, 1852. 



.JOSEPH HENRY, 



Secretary S. I. 



STEKEOTTPED BY L. JOHNSON h CO. 

 PHILADEIPHIA. 



PRINTEI) BY T. K. i P. G. COLLINS. 



MCZ LIBRARY 



HARVARD UillVERSirri 



Cpno"^'DG£. MA USA 



