42 NEW YORK STATE MUSEUM 



in this report. The material on which these notes are based has been 

 kindly loaned for study by the New York Mineralogical Club and an 

 individual New York collector. One new form for pyrite, two new 

 forms for chrysoberyl and two new forms for pyroxene are recorded 

 in these notes. In addition the minerals from Newcomb, Essex 

 county, have been made the subject of a crystallographic study of 

 some detail involving the species tourmalin, arsenopyrite and zircon. 

 This study has added two new forms for tourmalin and two for 

 arsenopyrite.- Some preliminary work has been done on the occur- 

 rences of quartz in the Little Falls dolomite of the Mohawk valley 

 as well as a large number of unpublished crystallographic determi- 

 nations on New York City minerals and extralimital species. 



The preliminary work connected with the installation of the col- 

 lections in the hall of mineralogy involving the details and arrange- 

 ment of cases has been completed. This work has been supple- 

 mented by the preparation of plans and schedules of types of cases 

 involving the entire case installation for the Museum exhibits for 

 the Education Building. 



Several notable additions to the mineral collections have been 

 made; barite from Frizington, England, a series of quartz speci- 

 mens in groups and loose crystals from Amsterdam, Montgomery 

 county, and others. The quartzes are remarkable in their sharpness 

 and transparency and compare very favorably with the famous 

 crystals from Herkimer county. These crystals occur in every 

 instance implanted on a thin layer of chalcedony which separates 

 them from the silicious limestone of the matrix and indicates a dis- 

 tinct change in the conditions of deposition of the silica between the 

 two formative periods. A series of minerals was collected from 

 Batchellerville, Saratoga county, prominent among which is a num- 

 ber of beryl crystals of unusual size ; the largest of these measuring 

 27 inches in height by 10 inches in diameter. These beryl specimens, 

 although not transparent are of a good characteristic green color, 

 are fairly sharp in outline and constitute fine additions to the New 

 York collection of minerals. From the same locality were obtained 

 some unusually large crystals of muscovite which yield on cleavage, 

 plates showing beautiful dendritic inclusions of magnetite and hema- 

 tite arranged on the structural lines of the muscovite. A number 

 of rose quartz specimens were also collected from Batchellerville, 

 some of which are of a color and transparency suitable for cutting 

 into spheres to show asterism. 



An intestering series of specimens of titanite, associated with 

 fluoritc, was collected from Fine, St Lawrence county. 



