rlOO NEW YORK STATE MUSEUM 



wise placed at the head of the principal groups and species. 

 These last two additions considerably increase the educational 

 value of the collection and materially aid the visitor in appre- 

 ciating many features which render it both interesting and in- 

 structive. 



o An economic collection to illustrate the minerals of com- 

 mercial importance has been prepared from duplicate material. 

 This is arranged in accordance with the classification given in 

 William's Applied Geology and is supplied with explanatory cards 

 at the head of each division. The economic collection occupies 

 the table cases in the northern section of the mineral museum 

 and is divided into a metalliferous section, including arsenic, 

 antimony, bismuth, gold, silver, platinum, mercury, copper, lead, 

 zinc, cadmium, tin, nickel, uranium, chromium, iron, manganese 

 and aluminum; and a nonmetalliferous section, embracing sub- 

 stances used for chemical purposes, ceramic materials, refrac- 

 tory materials, abrasives, graphic materials, pigments and ferti- 

 lizers. 



c As an accessory to the main collection, a small collection 

 illustrating the crystal habit of quartz has been arranged in 

 a portion of the table case in the southern section. This has 

 been selected to show the variation in the form of quartz crys- 

 tals from different localities and comprises 105 specimens. 



d A collection of 142 polished specimens showing the principal 

 minerals used for ornamental purposes has been prepared and 

 occupies a portion of one of the table cases in the southern 

 section. 



Throughout the 'collections the specimens have been carefully 

 examined, in some cases relabeled and in many instances rede- 

 termined. 



3 The work of visiting localities and collecting has progressed 

 during the month of May, and a reconnaissance of some of the 

 mineral localities in Jefferson and St Lawrence counties has 

 been made. Mineral specimens have been collected as follows: 



Pillar Point, Jefferson co. — Barite showing an interesting as- 

 sociation of calcite. Exhibited at the Pan-American Exposition. 



