00895cam a22002651a 4500 ca 06002473 DLC 20260227111043.0 900716s1883 paubf 000 0 eng ca 06002473 (OCoLC)22036407 DLC WHi WHi DLC premarc n-us-pa QE697 .L61 Lewis, Henry Carvill, 1853-1888. The great ice age in Pennsylvania / by H. Carvill Lewis. [Philadelphia? : Franklin Institute?, 1883] 21 p., [1] folded leaf of plates : map ; 24 cm. Cover title. "Abstract of a lecture, delivered at the Franklin Institute, January 5, 1883." "Reprinted from the Journal of the Franklin Institute, April, 1883." Geology Pennsylvania. Glacial epoch Pennsylvania. 13452 13452