1 V 



The preliminary statements in the first half of the work, 

 when it is used as an introduction to a course in geology, are 

 necessary to give full meaning to the latter half. When used as 

 a supplement, it is believed they will still bear reviewing. 



As soon as the student has outgrown this work he is in a posi- 

 tion to make use of larger and more technical works. Those 

 most important are: 



Natural History of New York; Division 6, Paleontology; 

 Vol. 4, Brachiopoda, price $2.50. 

 Vol. 5, Pt. I, Lamellibranchiata (1) Monomyaria, $2.50. 



il " " " il (2) Dimyaria, $2.50. 



" " Pt. II, Gastropoda etc., $2.50. 



Send orders to the Secretary of the University of the State 

 of New York, Albany, N. Y. 



The following very important and inexpensive works can be 

 ordered from the Director of the U. S. Geological Survey, Wash- 

 ington, D. C, for prices which follow: 



Bulletin 3, U. S. Geol. Survey, 1884, 36 PP-> $0-05. 



" l6 > " il li il ' 1885,86 pp., 3 pi., $0.05. 



41 4i» " " " " 1887, 121 " 4 " $0.15. 



" 76, " " " " 1891, 393 " $0.25. 



11 120, " " i( " 1894, 81 " $0.10. 



Topographic maps about Olean, Elmira and Ithaca at 5 cents 

 each. 



. The 13th, 15th and 16th annual reports of the State Geolo- 

 gist contain a vast amount of information on the geology of 

 southern and central New York. For conditions of distribution 

 apply to the State Geologist, or the State Paleontologist, Al- 

 bany, N. Y. 



Two very important volumes now out of print, but to be had 

 occasionally from second-hand dealers, are the large quarto vol- 

 umes by Hall and Vanuxem, known as the Final Report of the 

 State Geological Survey, volumes 3 and 4. They contain a great 

 amount of local geological information. They are usually sold 

 at $3.00 or $4.00 per volume. 



Cornell University: G, D. Harris, 



vSept. 30, 1899. 



