Lewis, Henry Carvill,  1853-1888. <br/><br/>
The great ice age in Pennsylvania / 
by H. Carvill Lewis. 
 - [Philadelphia? :  Franklin Institute?,  1883] 
 - 21 p., [1] folded leaf of plates :  map ;  24 cm. 
<br/><br/> Cover title.  "Abstract of a lecture, delivered at the Franklin Institute, January 5, 1883."  "Reprinted from the Journal of the Franklin Institute, April, 1883." 
<br/><br/><label>LCCN: </label>ca 06002473  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--Pennsylvania.<br/>Glacial epoch--Pennsylvania.
<br/><br/><label>LC Class. No.: </label>QE697  / .L61