CONTENTS. 



Page 



Epitome of the Progress of Natural Science, . - - - 97 



Antiquities and Languages of the Mexican Indians, - - - 104 



On the Acclimating Principle of Plants, . - . • - 108 



Fossil Remains found in Anne Arundel County, Maryland, - - 114 



On the Silver, Gold, and Platina of Russia, 118 



On the Effects of various Poisons on living Vegetables, - - 124 



On the value of Geological Information to Engineers, &c. • - 128 



Ornithological Biography of Audubon, - - - - • 136 



To Readers and Correspondents, 140 



Illinois Magazine, 144 



Wood's Mosaic History, American edition, 144 



Entered according to the Act of Congress, in the year one thouwnd eight 

 hundred and thirty-one, by Henry H. Porter, in the Clerk's OiRce of the 

 District Court of the United States, in and for the Eastern District of Penn- 

 sylvania. 



