iv Preface. 



In the preparation of this bulletin the aim has been to make the 

 descriptive notes plain and serviceable to all interested in the subject, 

 and to exclude the purely scientific observations of the field, leaving 

 them to be incorporated with the discussion of the occurrence, prop- 

 erties and general, economic relations of the building stone, which is 

 used in our State, 



In conclusion, I must acknowledge my indebtedness to the many 

 quarry owners, managers and superintendents, who have kindly 

 given their time and attention, in contributing valuable notes and 

 statistics. Special acknowledgments for data of quarry districts are 

 due to Messrs. Samuel Coykendall and Samuel Coles, of the Union 

 Blue Stone Company, of New York ; Gilbert Brady, Rochester ; 

 L. D. Leonard, Albion ; C. A. Gorman, Medina ; Edward Merritt 

 and Thomas S. Clarkson, Potsdam ; D. A. Parmeter, Hammond ; 

 Thomas J. Whitney, Gouverneur ; David Black, of the Thousand 

 Island Granite Company, Thurso ; Jas. Hughes and Wm. Crab tree, 

 Syracuse ; N. Hewitt, Amsterdam ; W. A. Nixon, and Edward 

 Willis of the Penryhn Slate Company, Middle Granville ; Wm. B. 

 Fitch, Kingston ; and F. G. Clarke, Oxford. 



To Prof. James Hall, State Geologist, I am indebted for many 

 facts bearing on the geological horizon of our quarries. 



JOHN C. SMOCK. 

 New York State Museum, 



Albany, N. Y., March 5, 1888. 



