60 GENERAL INDEX. 



Oil distilled from coal 1,72 



" " " bituminous shales 1,140 



" natural 1,72; VII.37, VlII,58-64 



Onondaga group 1, 130 ; II, xiii 



Oolitic limestone 1, 110 



Oriskany. group 1, 124 ; II, xii 



Peat 1,35-37; 111,255; IV, 124,134,148; V,72,102, 120,160 



Pentamerus beds 1, 177 



Permian rocks 1,47; 111,8 



Post-oak flats Ill, 85 



Pot-holes in limestone 111,252 



Potsdam sandstone 1, 163 



Prairies 1,9; V.10 



origin of, by LEO LESQUEEEUX 1,238-254 



Quaternary system 1, 8-10, 24-39, 160-102, 238-254; Y.4-14; VIII, 1-24 



Eecent formations included in Quaternary. 



Salt and"brine-wells IV.22,189; VI,2W,232; VII,31,38 



Saltpetre caves 1,405; 111,80 



Sandstone, Anvil rock 1,50,213 ; 111,7 



Calciferous 1,114,163; 111,280 



Ferruginous 1, 42 



for glassware VII, 40 



Mahoning 111,7 



Oriskany 1, 124 



Potsdam 1,163 



Pulaski Il.xvi 



St. Peter's 1,149,164; V.23; VII.39 



Thebes 1,139; 111,27 



Unionville V.147 



Waverly II, x 



Scalds : VI.184 



Sediments, how accumulated 1,18 



Shales.'Bituminous See Bituminous, and Chemical analyses of. 

 " Cincinnati See Cinnati group. 



' ' Lorraine II, xvi 



Silurian system II, x 



Slates of the Coal measures 1,63 



" Utica Il.xvii 



Springs See Water. 



St. Louis group 1, 83-89 ; VII, 16 



St. Peter's sandstone See under Sandstone. 



Stratified rocks, how formed 1,14 



Stylolites (read for "crystalites") 1, 115, 116 



Subcarboniferous system 1,76-118; II, ix; 111,1,17; VII.58 



Terrace epoch. See Quaternary. 



Tertiary system 1,44,417,447; VIII.3 



Thebes sandstone. See under Sandstone. 



Trees See Flora. 



Trenton group 1,141-149; VII, 40, 41 



Upper Carboniferous. See Coal Measures. 



' ' Coal Measures VI, 1 



Helderberg 1,120; II,xiii-xv; 111,407 



Magnesian 1,169,177 and PI. 4, opp. p. 162 



Silurian 1, 129-136 ; II, xi 



Utica slate II, xvii 



