6 



Indiana University Studies 



The writer wishes to take this opportunity^ to express his 

 obhgations to the following persons and firms: to Professors 

 Cumings and Beede, of the Department of Geology, and to 

 Professor Brown, of the Department of Chemistry, of Indiana 

 University, for suggestions and advice thruout the development 

 of the study; to Mr. W. J. Huddle, of the engineering firm of 

 Sloan Huddle and Company, of Indianapolis, who kindly offered 

 much advice on the engineering features of the paper; to Mr. 

 Eugene Perry of the Perry Stone Company^, to Mr. Fred Mathews 

 and Mr. E. J. Barrett of the Crescent Stone Company, and to 

 Mr. J. H. Nolan of the Nolan and Sons Stone Company, for 

 special data furnished by them; to all the operators and emploj^ees 

 of the stone belt for assistance whenever asked. For special 

 information furnished: Babcock and Wilcox Boiler Company, 

 Skinner Engine Company^, Harrisburg Foundry and Machine 

 Company, Sturtevant Mill Company^, E. I. DuPont de Nemours 

 Powder Company^, Abendroth and Root Boiler Company, Hooven 

 Owens Rentschler Engine Company, Ball Engine Company^, 

 Power and Mining Machinery Company, Earl C. Bacon Company, 

 Green Fuel Economizer Company, Terry Steam Turbine Com- 

 pany, General Electric Company, Smith Gas Power Company, 

 Irvin C. De Haven Company, Standard Gas Power Company, 

 Crocker-Wheeler Company, Dean Brothers Pump Company, 

 Ingersoll-Rand Company, Kingsford Boiler Company, Harrison 

 Safety Boiler Works, New England Gas Producer Company, 

 American Engine and Electric Company, Lidgerwood Manufactur- 

 ing Company, Deming Pump Company, Gould Pump Compan3^ 



In addition to the above mentioned firms, all of which sub- 

 mitted special data, there were numerous other companies that 

 quoted prices on their products. 



During the progress of the investigation the writer found 

 the representatives of all the manufacturing firms who handle 

 machinery applicable to the quarry industry eager to assist with 

 information wherever possible, and the owners of quarries and 

 mills ready to furnish smy information asked. An effort has been 

 made to give only approximate figures where the data too closely 

 touched an operator's business affairs. 



The study is a concise outline of the stone industry in Indiana 

 as a whole; and everything has been avoided that might be con- 

 strued as merely advertising the business. 



