A NOTICE 



ORIGIN, PROGRESS, AND PRESENT CONDITION 



ACADEMY OF NATURAL SCIENCES 



PHILADELPHIA 



BY 



W. S. W. RUSCHENBERGER, M.D. 



JRGEON U. S. NAVY. 



[Read before the Society, February 10, 1852.] 



The profit we derive from the works of creation will be in proportion to the 

 accuracy of our knowledge of them and of their properties.' 

 KIRBY AND SPENCE. ENTOMOLOGY. 



T. K. AND P. G. COLLINS, PRINTERS. 



1852. 



