466 N. H. DARTON — CATALOG OF PHOTOGRAPHS 



782. Quarry in Niagara limestone, Lockport, New York. 



829. Trenton limestone, Glens Falls, New York. 



833. Helderberg limestone at Howes cave, New York. 



838, 839. Helderberg limestone, south Bethlehem, New York. 



847. Becraft limestone, Rondout, New York. 



848. Cement near Whiteport, New York. 



952. Deshong quarry, near Chester, Pennsylvania. 



953, 1027. Ward's quarry, near Chester, Pennsylvania. 



954. Ohlinger Dam quarry, near Reading, Pennsylvania. 



955, 956. Leiper's quarry, Delaware county, Pennsylvania. 



960. Feldspar quarry, Delaware county, Pennsylvania. 



961 . Kaolin mine, Chester county, Pennsylvania. 



962. Kaolin mine at Hockeshin, Delaware. 



984. Lafayette soapstone quarry, Montgomery county, Pennsylvania. 



993. Rausch's gravel quarry, Bethlehem, Pennsylvania. 



994. Limestone quarry, Bethlehem, Pennsylvania. 



1000, 1026. Avondale quarry, Delaware county, Pennsylvania. 



1005. Potts' limestone quarry, below Morristown, Pennsylvania. 



1006. Limestone quarry, Port Kennedy, Pennsylvania. 



1029. Franklin slate quarry, Slatington, Pennsylvania. 



1030. Slate quarry, Bangor, Pennsylvania. 



1100. Grindstone quarry in Dakota sandstone, Edgemont, South Dakota. 



1127. Marble quarry, Knoxville, Tennessee. 



1151. Cambrian quartzite, Burlington, Vermont. 



1155. Marble quarry, West Rutland, Vermont. 



Rainprints 

 424. Modern rainprints, natural size ; dried mud from Great plains, Colorado. 



Recent Volcanic Features 



86-88. Saint Paul island, Alaska. 



224. End of Obsidian flow, Mono craters, California. 



225. Mono crater, California. 



239. Lava- capped river bed of the ancient Sacramento near Delta, California. 

 240-252. Scene of a late volcanic eruption in northern California. Cinder cone, 



lava field, ash-covered slopes, lava dam, volcanic bombs and blocks. 

 355-357, 361. Costa Rica. Ira Zu volcano. 

 359, 360. Costa Rica. Crater lake of Poas volcano. 

 460-494. Hawaiian islands. 

 627. Section of lava flow, El Pedregal of Tialpam, near San Angelo, Mexico. 



Relief Maps 



948. Rocky ridge and East broad top coal basins, in Huntington county, Penn- 



sylvania. 



949. Bald Eagle mountain and Nittany valley, Pennsylvania. 



950. Cornwall iron mines, Pennsylvania. 



