REPORT OF THE DIRECTOR I914 I3 



individual exhibitor has been the important element in the under- 

 taking, and that it has been so freely extended has greatly lightened 

 the task of those in charge as well as added much to the interest 

 of the exhibits, for in many instances it has far exceeded the 

 anticipated results. 



The features which have the most popular appeal undoubtedly 

 are the models that illustrate methods of extraction and prepara- 

 tion in current use by local enterprises. Among these is the model of 

 a modern salt works, which represents to scale the plant of the 

 Worcester Salt Co. at Silver Springs and is so constructed as to 

 show the various steps of manufacture as if in actual progress. 

 The making of salt by evaporation of brines is one of the historic 

 mineral industries in the State and one in which New York still 

 holds a very prominent place. A second model shows the operations 

 of salt mining at Cuylerville, Livingston county, where the Sterling 

 Salt Co. is engaged in producing rock salt from deposits that lie 

 at a depth of over looo feet. The mine model is accompanied by 

 a vertical geological section from the surface to the salt horizon. 

 The use of salt in the manufacture of soda products — caustic, 

 carbonate, bicarbonate etc. — is illustrated by means of a large 

 colored diagram prepared by the Solvay Process Co. which traces 

 the process from the extraction of the brine, the coal and the lime- 

 stone through the chemical reactions to the final products, of which 

 representative examples are shown. 



The manufacture and some of the important uses of Portland 

 cement are illustrated by materials, models and photographs con- 

 tributed by local companies and by the Association of American 

 Portland Cement Manufacturers ; the display of the latter takes the 

 form of a model of a cement road as constructed in New York 

 State with a background of colored transparencies (illuminated) 

 that depict the various stages of road-building amid typical New 

 York scenery. In the exhibit of limestones and lime manufacture 

 are included some remarkable specimens of calcites both in groups 

 and single crystals from the quarries at Sterlingbush. 



An extensive collection of iron ores has been brought together 

 from the more important occurrences within the Adirondacks, the 

 Clinton belt and the southeastern Highlands. The Mineville de- 

 posits are well represented by samples of the crude and concen- 

 trated magnetites and of the derived furnace products. A collec- 

 tion of minerals and rocks assembled by the engineering staff of 

 Witherbee, Sherman & Co. during a period of several years illus- 

 trates the geological occurrence of the magnetites in the eastern 



