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Remarks on Gulf Tertiaries. American Naturalist, vol. xviii, p. 562 

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The synchronism of geological formations. Proceedings of the Philadel- 

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Remarks on Florida Tertiary. Science, vol. iii, p. 607 (% page). 



The ice of the Glacial period. Proceedings of the Philadelphia Academy 

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Ahstract. Am,erican Naturalist, vol. xvii, 1883, pp. 578, 905-906 (% page). 



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Remarks on fossils from Laredo, Texas. Read to the Philadelphia Acad- 

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Examination of fossiliferous pebbles from near East Park reservoir, 

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1885. Glacial action in Labrador. Read to the Philadelphia Academy of Nat- 



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Town geology : The lesson of the Philadelphia rocks. Philadelphia, 134 

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On grouping of phosphate beds in Oligocene with Jackson and Vicksburg 

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Pebbles from boring on Blacks island, Philadelphia. Read to the Phila- 

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Fossiliferous pebbles in drift at Tacouy, Pennsylvania. Read to the 

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Shell from mouth of Manatee river, Florida. Science, vol. vi, p. 499 (% 

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Lower Helderberg boulder at Summit, New Jersey. American Natural- 

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Remarkable exposure of columnar trap near Orange, New Jersey. Pro- 

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1886. Observations in Florida. Science, vol. vii, p. 353 (% page). 



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(1/10 page). 

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