Maclure, William,  1763-1840. <br/><br/>
Observations on the geology of the United States of America;  with some remarks on the effect produced on the nature and fertility of soils, by the decomposition of the different classes of rocks; and an application to the fertility of every state in the Union, in reference to the accompanying geological map ... 
By William Maclure. 
 - Philadelphia,  Printed for the author by A. Small,  1817. 
 - ix, [10]-127, [2] p.  front. (fold. map) fold. pl.  21 cm. 
<br/><br/> Read as a memoir before the American philosophical society, and inserted in the first volume of their Transactions, new series. 
<br/><br/><label>LCCN: </label>gs 06000814 //r862 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--United States.
<br/><br/><label>LC Class. No.: </label>QE77  / .M12