450 



PROCEEDINGS OF BALTIMORE MEETING. 



908. Glacial bowlder, brink of Yellowstone canyon. 



909. Erratic bowlders, Pleasant valley. 



910. Basalt cliff, near Tower falls. 



911. Hoodoo temple, Hoodoo basin. 



912. Hoodoos, Hoodoo basin. 



913. Lithophysae, half a mile above falls on lower Fire Hole river. 



914. Lithopbysse, half a mile above falls on lower Fire Hole river, 



915. Keplers cascade, Fire Hole river. Upper Geyser basin. 



916. Spring in Gallatin canyon, Gallatin range. 



917. Emerald Creek falls ; basalt cliffs. 



918. Tower falls. 



919. Eustic falls, Glen lake. 



920. Keplers cascade, Fire Hole river, Upper Geyser basin. 



921. Face of natural bridge of rhyolite, Bridge creek. 



922. Natural bridge of rhyolite, Bridge creek. 



923. Small geyser in eruption, in Upper Geyser basin. 



924. Eustic geyser in eruption, Middle Geyser basin. 



925. Eunway of Indigo spring. 



926. Outlet of Excelsior geyser. 



927. Algae basins (showing formation of silicious sinter), Emerald spring, U{)])er 



Geyser basin. 



928. Spike geyser, Witch creek. 



929. Silicious sinter from Coral spring. 



930. Gallatin lake, head of Gallatin river, one of the three forks of the Missouri. 

 931.' Bannock peak, Gallatin range. 



932. Yellowstone canyon, opposite Towner falls. 



933. Basalt cliff near Tower falls. 



934. Basalt cliff near Tower falls. 



935. Intrusive basalt, showing columns of cooling, Orange quarry. New Jersey. 



936. Petrified tree trunk. Fossil forest. 



937. Fossil tree trunks. Fossil forest. 



938. Petrified tree trunk. Lamar valley in distance. 



Sixty-one (6 x 8) photographs taken by N. H. Darton. 



939. Potsdam sandstone lying on crystalline rocks, just below Jessups landing, on 



Hudson river, Saratoga count}'^. New York. Looking south. Shows thin 

 bedded sandstones and basal conglomerates and many points of actual con- 

 tact with crystalline rocks. 



940. Potsdam sandstone lying on crystalline rocks, just below Jessups landing, on 



Hudson river, Saratoga county, New York. Shows thin bedded sandstones 

 and basal conglomerates and many points of actual contact with the crystal- 

 line rocks. Published as a plate in report of state geologist of New York for 

 1893. 



941. Potsdam conglomerate on crystalline rocks near Mosherville, Saratoga county, 



New York. Published as a plate in report of state geologist of New York 

 for 1893. 



942. Glaciated surface of Potsdam conglomerate near Mosherville, Saratoga county, 



New York. Published as a plate in report of state geologist of New York 

 for 1893. 



