Proceedings of the American Philosophical Society Held at Philadelphia for Promoting Useful Knowledge, Томи 10 – 11American Philosophical Society, 1967 |
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Сторінка 189
... surface . Operations are still going on , and at least two of the wells will be put down to 1500 feet . New wells are being com- menced near the Oil Springs , though the opinion seems to be gain- ing ground that the deposits of oil are ...
... surface . Operations are still going on , and at least two of the wells will be put down to 1500 feet . New wells are being com- menced near the Oil Springs , though the opinion seems to be gain- ing ground that the deposits of oil are ...
Сторінка 458
... surface , as many of the springs yield maltha of varying density , and wells bored to a depth of from fifty to four hundred feet , have yielded bitumen which had undergone a greater or less change . A careful study of the different ...
... surface , as many of the springs yield maltha of varying density , and wells bored to a depth of from fifty to four hundred feet , have yielded bitumen which had undergone a greater or less change . A careful study of the different ...
Сторінка 477
... surface is covered with a deposit of loose material , as fine earth and fragments of rock . The hills have therefore been so smoothed down that it is difficult to see the basin rocks in continuous lines . We saw enough however to show ...
... surface is covered with a deposit of loose material , as fine earth and fragments of rock . The hills have therefore been so smoothed down that it is difficult to see the basin rocks in continuous lines . We saw enough however to show ...
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Three | 27 |
Pending nominations Nos 534 535 536 and 537 were | 28 |
Present ten members | 105 |
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American American Philosophical Society anticlinal appear appointed April arkite axis Bache barometric beds bitumen black slate blue Boston Carboniferous Chair character clay Coal Measures Committee Cresson Cretaceous dated declination Devonian disc disturbances Donations east elected feet thick fissure formation Fraley Franklin Institute Geological gravity gray hard Hayden Hills Historical Society horizon inches iron January Judge Kentucky lamellæ Lesley letter Library were announced Library were received lignite limestone London magnetic March Meeting meteors miles Missouri Missouri River motion mountains nearly neutral point observations Paint Creek Pending nominations Pennsylvania petroleum Philadelphia Philosophical Society plants plate polarity present President Prof referred remarkable River rock sand sandrock Sandstone septum Shale Soapstone Society was adjourned solar species specimens Spirifera stone stream surface temperature tion Trego upper valley variation Venango County wood