112 NEW YORK STATE MUSEUM 



1879 Dale, T, N. On the Age of the Clay-slates and Grits of Pough- 

 keepsie. Amer. Jour. Sci., Ser. 3. 17:57-59. 



1879 Dana, J. D. On the Hudson River Age of the Taconic Schists 

 ^nd on the Dependent Relations of the Dutchess Co. and Western Con- 

 necticut Limestone Belts. Amer. Jour. Sci., Ser. 3. 17:375-88 and 

 18:61-64. 



1879 Gerard, W. R. The Hudson Group at Poughkeepsie. Amer. 

 Nat. 13:199. 



1879 Whitfield, R. P. Discovery of Specimens of Maclurea Magna 

 of the Chazy in the Barnegate Limestone near Newburgh, N. Y. 

 Amer. Jour. Sci., Ser. 3. 18:227. 



1879 Dwight, W. B. On Some Recent Explorations in the Wap- 

 pinger Valley Limestone of Dutchess Co., N. Y. Amer. Jour. Sci. Ser. 3. 

 17:389-92. 



1879 Dwight, W. B. The Results of Some Recent Paleontological 

 Investigations in the Vicinity of Poughkeepsie. Proc. Poughkeepsie 

 Soc. of Nat. Sci. Oct. 1879 to July 1880. p. 15-20. 



1880 Dwight, W. B. Recent Explorations in the Wappinger Valley 

 Limestone of Dutchess Co. New York. Number 2, Calciferovis as well 

 as Trenton Fossils in the Wappinger Limestone at Rochdale and a 

 Trenton Locality at Newburgh, New York. Amier. Jour. Sci., Ser. 3. 

 19:50-54. 



1880 Dana, J. D. Note on the Age of the Green IMountains. Amer. 

 Jour. Sci. Vol. 19, Mar. 1880. 



1880 Dana, J. D. Geological Relations of the Limestone Belts of 

 Westchester Co., New York. Amer. Jour. Sci. v. 20, July, Sept., Nov., 

 Dec. 1880. 



1881 Dana, J. D. Idem. v. 21, June 1881, and v. 22, Aug. and Oct. 

 1881. 



1881 Dwight, W. B. Further Discovery of Fossils in the Wappin- 

 ger Valley in the Barnegate Limestone. Amer. Jour. Sci., Ser. 3.21:78-79. 



1882 Dana, J. D. Geological Age of the Taconic System. Quar. 

 Jour, of the Geol. Soc, Aug. 1882. 



1883 Booth, H. & Lown, C. Discovery of Utica Slate Graptolites 

 on the West Side of the Hudson. Amer. Jour. Sci., Ser. 3. 25:380-81. 



1883 Hunt, T, S. A Historical Account of the Taconic Question in 

 Geology, with a Discussion of the Relations of the Taconic Series to 

 the Older Crystalline and to the Cambrian Rocks. Roy. Soc. of Canada 

 Trans. Sec. 4. 1:217-70. 



1883 Dwight, W. B. Recent Investigations and Paleontological 

 Discoveries in the Wappinger Limestone of Dutchess and Neighboring 

 Counties, New York. A. A. A. S. Proc. 31:384-87. 



1884 Dwight, W. B. Recent Explorations in the Wappinger Valley 

 Limestone of Dutchess Co., New York: Number 4, Description of 

 Calciferous (?) Fossils. Amer. Jour. Sci., Ser. 3. 27:249-59. 



1884 Dwight, W. B. Report of Progress in Geological Investiga- 

 tion in the Vicinity of Poughkeepsie. Vassar Bros. Inst. Trans. 

 2:141-52. 



1884 Hall, James. Hudson River Age of the Taconic Slates, written 

 by J. D. D. Amer. Jour. Sci., Ser. 3. 28:311-12. 



