JOURNAL 



OF 



THE ACADEMY OF NATURAL SCIENCES 



OF 



rs OTIC E. 



The publication of this Journal having been unavoidably suspended for several years, it is now 

 resumed in a New Series. 



The work will be continued hereafter semi-annually, so that two parts will appear each year, or 

 four in two years, which will form a volume. 



The work will be furnished at ^5 per volume, or ^1 25 for each part, payable on delivery. 



The 'printed Proceedings of the Society, will be distributed to subscribers to the Journal free of 

 charge, during the period of their subscription. 



Copies of the First Series of the Journal, in 8 vols., octavo, may be obtained at $16 for the entire 

 set, on application to the Publication Committee, William S. Vaux, Esq., 145 Arch street, Chairman, 

 or at the Hall of the Academy. 



Applications from a distance may be made through the Corresponding Secretary. 



J,:^t'*f 



PHILADELPHIA: 

 PRINTED FOR THE ACADEMY, 



BY MERRIHEW & THOMPSON, NO. 7 OARTBB's ALLEY. 



1847—1850. 



