TABLE OF CONTENTS. 199 



Page, 

 and J. J. Stevenson in 1874. Leo Lesquereux's reply to Newberry's criti- 

 cism. F. V. Hayden's summary in 1875. A. C. Peale's views. Views of 

 C. A. White in 1877. Mews of Hayden in 1878. Views of Clarence King 

 in 1878. L. F. Ward's Flora of the Laramie Group in 1885. Studies < if 

 ('. A. White and T. W. Stanton in 1891; of F. H. Knowlton and T. W. 

 Stanton in 1897. 



CHAPTER XL 



The Taconic Question 659 



First statement of the problem by Ebenezer Emmons. < Studies by H. D. 

 Rogers and James Hall. Review of the subject by Emmons, 1842-1844. 

 Announcement of the finding of fossil crustaceans (trilobites) in the Black 

 slate of Bald Mountain. Views of C. B. Adams in 1847. Report of com- 

 mittee on Taconic question in 1848. Hall's views on report of committee. 

 Views of T. Sterry Hunt in 1849. Emmons's third presentation of subject 

 in 1855. Finding of trilobites in the Black slates of West Georgia, Vt. 

 Views of Elkanah Billings and Barrande. Writings of Jules Marcou. 

 Views of Edward Hitchcock and A. D. Hager. Views of J. B. Perry in 

 1869. Work of Rev. A. Wing in 1870. Views of Elkanah Billings in 1872. 

 Reply by Dana to Billings's statements. Dana's articles in the American 

 Journal of Science. Finding of brachiopods in Taconic. slates at Pough- 

 keepsie, N. Y., by T. Nelson Dale. James Hall's views in 1884. Dana's 

 views, 1885-1887. Work of C. D. Walcott in 1886. Discussion of the 

 subject at the eighth meeting of the American Committee of the Interna- 

 tional Geological Congress in 1888. Conclusion. 



Appendix A 677 



Tables showing the general development of the geological column, as 

 given in the principal text-books. 



Appendix B 687 



Brief biographical sketches of the principal workers in American 

 geology. 



