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NEW YORK STATE MUSEUM 



MINERALOGY 



In the division of mineralogy work has progressed along the 

 following lines: 



Publication 



During the year Mr Whitlock has completed Museum bulletin 

 58 entitled Guide to the Mineralogic Collections, illustrated 

 with 249 text figures and 77 halftone reproductions from photo- 

 graphs of specimens in the mineralogic collection. It is believed 

 that this work will prove useful to teachers and students of 

 mineralogy throughout the State as well as to those who visit the 

 museum with the intention of studying its collections. The divis- 

 ion is, at present, engaged in preparing for publication a detailed 

 list of the mineral localities of the State, compiled from all avail- 

 able records and supplemented by facts obtained from a recon- 

 naissance of the principal localities. 



Curatorial work 



Following out the policy of installation of educational ex- 

 hibits, an introductory collection has been prepared with a 

 view of furnishing the visitor with the elementary knowledge 

 necessary to a more perfect appreciation of the main collection. 

 This introductory collection, which serves also to illustrate 

 the introductory section of the guide mentioned above, con- 

 tains specimens and models illustrative of the formation, crystal- 

 lization and physical properties of minerals. 

 " Advantage was taken of the recent popular interest in vol- 

 canism aroused by the eruption of Mt Pelee by preparing a 

 small exhibit to illustrate the theory of volcanic action and 

 volcanic distribution and products. This exhibit, which con- 

 sists of a small relief model in clay, maps, photographs and speci- 

 mens and descriptive text, is installed in the section devoted to 

 geology on the second floor. 



The collection illustrating the mineral resources of the State 

 which was displayed at the Pan-American Exposition is now 

 permanently installed on the second floor. A series of photo- 

 micrographic transparencies, showing the appearance of typical 

 rocks in thin section under the petrographic microscope, has 



