410 N. H. DRRTON— CATALOG OF PHOTOGRAPHS 



631. Sea cliff in boulder clay, with beach in foreground, South Manitou island, 



lake Michigan (No. 129). 



632. Sea-cliff in sand, with beach, Sleeping Bear point, eastern shore of lake 



Michigan (No. 111). 



633. Sea-cliff in boulder clay, South Manitou island, lake Michigan (No. 113). 



634. Sea-cliff in boulder clay, North Manitou island, lake Michigan (No. 134). 



635. Beach of limestone pebbles, Mackinaw island, Michigan (No. 158). 



636. Gravel spit, with driftwood, near Mackinaw island, Michigan (No. 161). 



637. A spit forming under water, western end of Bois Blanc island, Michigan; 



Mackinaw island in the distance (No. 148). 



638. Spit of shingle, Au Train island, lake Superior (No. 168). 



639. Curved sand spit, southern channel, strait of Mackinaw (no negative). 



640. A recurved spit, "Duck point," Grand Traverse bay, lake Michigan (No. 



102). 



641. Bar joining Empire and Sleeping Bear bluffs, eastern shore of lake Michigan 



(No. 114). 



642. Ancient sea-cliff of lake Michigan, near Glen Arbor, Michigan (No. 106). 



643. Ancient sea-cliff of lake Michigan, South Manitou island, lake Michigan 



(No. 137). 



644. Sand dunes near Sleeping Bear bluff, eastern shore of lake Michigan (No. 109). 



645. Forest formerly buried beneath drifting sand and now exposed by eolian 



erosion. High part Of South Manitou island, lake Michigan (No. 131). 



Minnesota 

 Photographed by J. F. Kemp, Columbia University, New York, New York 



5 by 7 inches 



646. Open cut at iron mines of the Minnesota company near Tower, Minnesota. 



647. Sunken ground over the Chandler mine, Ely, Minnesota. 



648. Oliver mine, Virginia, Minnesota ; entering cut, upper bench gravel, lower 



bench ore. 



649. Working face of the Mountain iron mine, Minnesota. 



650. Working face of the Mountain iron mine, Minnesota. 



651. Surface panorama of Canton mine, Mesabi range, Minnesota. 



652. Caved surface of Canton mine, Mesabi range, Minnesota. 



Missouki 



Photographed by E. L. Furguson 



6J by 8J inches 



653. A western Missouri coal mine. 



Photograpfied by J. F. Kemp, Columbia University, New York, New York 

 5 by 7 inches 



654. Open cut and stopes at Pilot knob, Missouri, showing the relations of the 



specular hematite to the porphyry, and also the thickness of the ore body. 



