NATURAL HISTORY MUSEUMS 129 



Polytechnic institute museum, Brooklyn. Henry Sanger Snow 

 in charge. 



Paleontology. 1000 specimens: chiefly of Paleozoic age. 



Mineralogy. 3000 specimens including what was formerly 

 known as the Smith collection which is particularly rich in 

 micas. 



Ecanomic geology. A series of ores, chiefly of silver, copper 

 and iron. 



Lithology. 500 specimens: series of plutonic and metamorphic 

 rocks. 



Zoology. 1000 specimens: chiefly shells and insects. 



Ethnology. 100 implements of the stone and bronze ages. 



Rensselaer polytechnic institute museum, Troy. The museum is 

 under the direction of the trustees of the institute, and in charge 

 of the instructors in the departments represented. John M. 

 Clarke^ professor of geology and mineralogy. 



Paleontology. 1500 specimens adapted to purposes of instruc- 

 tion: chiefly from the Paleozoic rocks of New York and Pennsyl- 

 vania with no type specimens, and largely the donations of Prof. 

 James Hall. 



Mineralogy. A collection of about 5000 selected minerals of 

 great historic value, the choicest specimens of which constitute 

 the students study collection. 



Lithology. 3000 specimens: a very complete collection of re- 

 cent volcanic rocks; a good series illustrating the structure of 

 crystalline rocks; a series representing structural and dynamic 

 phenomena; an economic collection of about 1500 specimens 

 illustrating nonmetallic produces, metallic ores, and metallur- 

 gical processes and products. 



Zoology. A collection of recent Mollusca comprising about 

 10,000 specimens; a small series of invertebrates and vertebrates 

 for students' use; about 350 specimens of mounted birds, and a 

 few mammals. 



Botany. A general herbarium of 5000 plants; and about 300 

 specimens of woods. 



Ethnology. Collection small. 



