INTRODUCTION. 



This bulletin has been prepared at my request by Mr. Frank L. 

 Nason, of the Geological Survey of New Jersey, formerly of the 

 Rensselaer Polytechnic Institute of Troy. 



Mr. Nason was employed for a time by the State Museum to assist 

 in the work of arranging for exhibition the general collection of min- 

 erals ; and, also, in collecting minerals in Essex and Warren counties. 



Three suites of minerals in the general mineralogical collection of the 

 Museum are noticed in this bulletin. And it is divided into the 

 following parts, descriptive of these three several collections: 

 I 1. A description of a new locality of fine brown tourmaline and 

 associated minerals, brought to the notice of the Museum by Mr. 

 |C. E. Beecher, consulting palaeontologist of the New York State 

 rljuseimi and assistant in the Yale University Museum. J| M 



2. A notice of some pyroxenes and associated minerals, found at 

 the Chilson Hill mine, in the town of Ticonderoga, Essex county, by 

 C. E. Beecher and Frank L. Nason. 



3. Calcites collected by the late Prof. E. Emmons, State Geologist, 

 at the lead mines of Eossie, St. Lawrence county, N. Y. 



The first and second collections, here mentioned, represent the direct 

 work of the Museum within the past two years ; the last represents, 

 also, although indirectly, work clone about fifty years ago. 



No attempt has been made to give a strictly technical description 

 of the minerals noticed, but it is hoped that this bulletin may serve 

 to direct the attention of students to them and to some special fea- 

 tures of the Museum collections. 



JOHN C. SMOCK, 



Assistant-in-charge JST. Y. State Museum. 

 Albany, N. Y., August, 1888. 



