THE MINING AND QUARRY INDUSTRY 

 Value of production of pottery 



67 



Ware 



1904 



1905 





$77 



726 



$115 



890 



44 



490 



30 



740 



740 



000 



800 



000 



490 



095 



600 



32s 



85 



823 



73 603 



Stoneware 



Red earthenware 



a Porcelain and semiporcelain . 

 Electric and sanitary supplies 

 Miscellaneous 



Total 



$1 438 634 i $1 620 558 



^ Includes china tableware. 



Crude clay 



In the foregoing tables relating to clay products no account has 



been taken of the crude clay entering into their manufacture. There 



are a few producers in the State which do not utilize the crude clay 



themselves, but ship it to plants at other localities. Some of the 



material, like the Albany slip clay for example, is even forwarded 



to points without the State. For 1905 returns- have been received 



from nine firms engaged in this industry whose total shipments 



amounted to 6'j()6 short tons, valued at $16,616. Of this quantity 



3005 tons, valued at $11,886, consisted of slip clay from Albany 



county. The corresponding figures for the preceding year were 



8959 tons valued at $17,164, of which 3228 tons, valued at $9630, 



was slip clay. 



Bibliography 



Beck, Lewis C. Mineralogy of New York. 1842. 



Hall, James. Survey of the 4th Geological District. 1843. 



Luther, D. Dana. Geology of Onondaga county. N. Y. State Mus. 49th 



An. Rep't. v.2. 1898. 

 Mather, W. W. Geology of New York. Report on First District. 1843. 

 Nason, F. L. Economic Geology of Albany county. N. Y. State Mus. 47th 



An. Rep't. 1894 

 Ries, H. Clays of New York; their Properties and Uses. N. Y. State Mus.. 



Bui. 35. 1900. 

 Woodworth, J. B. Pleistocene Geology of Nassau County and Borough of 



Queens. N. Y. State Mus. Bui. 48. ' 1901. 



DIATOMACEOUS EARTH 



Diatomaceous earth is an accumulation of the silicious skeletons 

 of microscopic organisms known as diatoms. Deposits are found 

 on the sites of former lakes, the waters of whicli were inhabited by 

 these organisms, and are also being formed on the bottoms of exist- 

 ing ponds and lakes. The purer varieties of diatomaceous earth 

 which have commercial application contain 85 per cent or more of 



