PING EX 
The superior figures tell the exact place on the page in ninths; e. g. 
424° means page 424 beginning in the third ninth of the page, i. e. about 
one third of the way down. 
Ami, H. M., on thickness of Utica 
shale, 428%. 
Amsterdam, situation, 419*; strati- 
graphy, 432°-41’. 
Amsterdam section, 474’. 
Bean hill section, 471°-72°. 
Birdseye limestone, 421°-23'; thick- 
ness, 421°, 433°, 442°, 464°; expos- 
ures, 483°, 486*, 4871, 437°, 439°, 
441°, 447°, 454°, 4574, 457°, 460*, 
473°, 474°, 4757, 476°; quarries, 483°, 
473°; conclusions regarding, 464°. 
Black river limestone, 4237-24"; thick- 
ness, 424°; exposures, 483°, 486%, 
437°, 4387, 440°, 441°, 444", 447°, 
454°, 456°, 457°, 460*, 473°, 4735, 
474°, 476°; conclusions regarding, 
465°. 
Calciferous sandrock, 419°-21°; thick- 
ness, 420°-21', 445°, 464°; expos- 
ures, 433°, 433°, 4347, 485°, 436°, 
437°, 439°-40', 441°, 4421, 444° 4537, 
456°, "459°, 460°, 4727, 4747, 474°, 
475°, 476*; quarries, 440°, 479°; 
chart illustrating distribution of 
species, 466°. 
Chuctanunda creek, 483°. 
Conrad, T. A., on Calciferous sand- 
rock, 420°; on Birdseye limestone, 
421°; on Utica shale, 426°; on gray 
sandstones and shales of Salmon 
river, 428°, 
Crane’s village, 436°. 
Cumings, BH. R., Lower Silurian sys- 
tem of eastern Montgomery 
county, 419-68. 
Dana, J. D., on thickness of Utica 
formation, 427°; on thickness of 
Hudson river shales, 429%. 
Darton, N. H., on Birdseye lime- 
stone, 422°, 4777; on Black river 
limestone, 424°; on. Hoffman 
fault, 475‘; on Ingham Mills sec- 
tion, 4697; measurement of Cal- 
ciferous and Trenton stages, 462°; 
on Utica shale, 427*; on Wing 
quarry, 477°. 
Eaton, Amos, on Calciferous sand- 
rock, 4197-207; use of term Birds- 
eye, 421°; on Trenton limestone, 
424", 
Emmons, Ebenezer, on fossils in 
Birdseye limestone, 422°; on Black 
river limestone, 424°; on Calcifer- 
ous sandrock, 420°; on thickness 
of Hudson river shales, 429*; on 
Lorraine shales, 429°; on Utica 
shale, 427°; on thickness of Utica 
shale, 427°. 
Evakill, 480’. 
Featherstonhaugh lake, 431°. 
Finch and Pruyn quarry, 480°. 
Glens Falls section, 480*-82°. 
Hall, James, on Calciferous forma- 
tion in the Mohawk valley, 420°- 
21°; on Hudson river group, 429°, 
4297; on Trenton limestone ex- 
posures, 477°. 
Hoffman fault, 449°-56°, 475*-767. 
Hudson river formation, contact 
with Utica slate, 428°-297, 463°- 
64°, 470%, 472‘; topographic fea- 
