COMPOSITION, DISTRIBUTION, AND EXCAVATION OF GYPSUM. 27 



MICHIGAN. Gregory, W. M. Gypsum in Arenac and adjoining counties. 



Ann. Rep. Michigan Geol. Surveyfor 1901, pp. 15-18. 

 1902. 



Grimsley, G. P. Preliminary report on the gypsum deposits 

 of Michigan. Ann. Rep. Michigan Geol. Survey for 1902, 

 pp. 4-10. 1903. 

 Grimsley, G. P. Gypsum deposits in Michigan. Bulletin 



223, U. S. Geol. Survey, pp. 45-47. 1904. 

 Grimsley, G. P. A theory of origin for the Michigan gypsum 

 deposits. American Geologist, vol. 34, pp. 378-387. 

 Dec., 1904. 



Grimsley, G. P. The gypsum of Michigan and the plaster 

 industry. Vol. 9, pt. 2, Reports Michigan Geol. Sur- 

 vey. 1904. 

 MONTANA. Weed, W. H. Gypsum deposits in Montana. Bulletin 223, 



U. S. Geol. Survey, pp. 74, 75. 1904. 

 NEVADA. Louderback, G. D. Gypsum deposits in Nevada. Bulletin 



223, U. S. Geol. Survey, pp. 112-118. 1904. 

 NEW MEXICO. Herrick, H. N. Gypsum depos'.ts in New Mexico. Bulletin 



223, U. S. Geol. Survey, pp. 89-99. 1904. 

 NEW YORK. Clarke, W. C. The gypsum industry in New York State. 



Bulletin 11, N. Y. State Museum, pp. 70-84. 1893. 

 Eckel, E. C. Gypsum deposits in New York. Bulletin 223, 



U. S. Geol. Survey, pp. 33-35. 1904. 



Lincoln, D. F. Report on the structural and economic 

 geology of Seneca County, N. Y. 14th Ann. Rep. 

 N. Y. State Geologist, pp. 60-125. 1896. 

 Luther, D. D The economic geology of Onondaga County, 

 New York. 15th Ann. Rep. N. Y. State Geologist, vol. 

 1, pp. 241-303. 1897. 

 Merrill, F. J. H. Salt and gypsum industries of New York. 



Bulletin 11, N. Y. State Museum, 89 pp. 1893. 

 Parsons, A. L. Recent developments in the gypsum in- 

 dustry in New York State. 20th Ann. Rep. N. Y. State 

 Geologist, pp. 177-183. 1902. 



Pohlman, J. Cement rock and gypsum deposits in Buffalo. 

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 1889. 



OHIO. Orton, E. Gypsum or 'and plaster in Ohio. Vol. 6, Re- 



ports Geol. Survey Ohio, pp. 696-702. 1888. 

 Peppel, S. V. Gypsum deposits in Ohio. Bulletin 223, 



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OKLAHOMA. Gould, C. N. Oklahoma gypsum. 2d Biennial Rep. 



Oklahoma Dept. Geology, pp. 75-137. 1902. 



