574 PROCEEDINGS OF THE PHILADELPHIA MEETING 



The first paper presented was 



GARNET CONTACT ZONES AND ASSOCIATED COPPER ORES AT SAN JOSE, 

 TAMAULIPAS, MEXICO 



BY J. P. KEMP 



The paper was discussed by J. P. Iddings, H. S. Washington, Whitman 

 Cross, and A. C. Lane. It will be published in the transactions of the 

 American Institute of Mining Engineers. 



The second paper was 



OCCURRENCE AND DISTRIBUTION OF CELESTITE-BEARING ROCKS 

 BY EDWARD H. KRAUS 



[Abstract] 



A study of the rocks— shales and dolomitic limestones — of the upper portion of 

 the Salina epoch in central New York shows that celestite occurs quite widely dis- 

 seminated throughout them (1) in the form of well developed crystals and (2) in 

 small circular spots. The celestite was no doubt deposited simultaneously with the 

 rock material. The rocks on the island of Put-in-Bay, lake Erie, and in southern 

 Michigan, especially those at the May bee quarry, Monroe county, show a similar 

 occurrence of celestite. When celestite-bearing rocks are leached by the action of 

 circulating water the celestite passes quite readily into solution, and the rock then 

 assumes a porous character; in this manner the so-called " vermicular limestones" 

 of New York, and also the ''gashed" and "acicular" dolomites of Michigan, may 

 be explained. Such celestite-bearing rocks are also the source of the large deposits of 

 celestite which are so abundant on the islands of lake Erie — especially Put-in-Bay — 

 and at the Maybee quarry, Monroe county, Michigan. 



The paper was discussed by A. C. Lane, A. P. Coleman, E. H. Kraus, 

 G. P. Merrill, and the Chairman. It is published in full in American 

 Journal of Science, volume xix, pages 286-293, April, 1905. 



The third paper was 



LIMESTONES OF CENTRAL AND SOUTHERN CALIFORNIA 

 BY T. C. HOPKINS 



Remarks were made by J. S. Diller. # 



The fourth paper was 



ORIGIN OF VEINS IN ASBESTIFORM SERPENTINE 

 BY GEORGE P. MERRILL 



The paper was discussed by A. P. Coleman, J. P. Iddings, F. D. Adams, 

 J. F. Kemp, and the Chairman. It is printed as pages 131-136 of this 

 volume. 



