1000 REPORT OF NATIONAL MUSEUM, 1895. 



Following this label is a series of six typical elements with some of 

 their native combinations. Each specimen is monnted on a block as in 

 the systematic series, in front of which is a small label giving the name, 

 composition, locality, etc., of the individual. 



THE STUDY SERIES. 



i'his series contains all that material which appeals exclusively to the 

 specialist. It is the source of the material from which new exhibition 

 series are built, or old ones strengthened. In it is placed all that mate- 

 rial which has been the source of investigations, or which it is thought 

 may be made the subject of research. It contains all those specimens 

 which serve to illustrate the occurrence and associations of a mineral 

 in any one locality that are not needed for the exhibition series, or which 

 are not unnecessary duplications of material already on hand. 



Each specimen in this series is numbered, labeled, and placed in a 

 paper tray. The several specimens are then arranged geographically 

 by species; the species arranged in groups, as in the systematic series, 

 and placed in drawers. Each drawer contains but one species, and a 

 label giving the contents of that drawer is pasted in the upper left-hand 

 corner of its front. 



This series also includes all the original and type material belonging 

 to the Department. These are brought together in a series of drawers 

 reserved for that purpose, and all of the type or original specimens 

 which are not needed to complete the exhibition series are here placed, 

 together with a copy of the original papers, or at least a reference to 

 them, and a bibliography in which the work has appeared. Those types 

 used in the exhibition series are here indicated by a card giving its 

 exact position in the cases. 



THE DUPLICATE SERIES. 



This series includes all that material not needed for the exhibition or 

 study series; and from it all exchanges, gifts, etc., are made up. 



INSTALLATION. 



The species and varieties of minerals — that is, the systematic 

 series — are arranged in forty-six slope front-floor cases. Beginning with 

 the first on the right, entering the hall from the north, the contents of 

 these cases are as follows : 1-2, native elements ; 3-4, fluorides, chlorides? 

 bromides, and iodides; 5-9, sulphides, selenides, tellurides, arsenides, 

 antimonides, and sulphosalts; 9-16, oxides; 17, borates, aluminates, 

 chromites, ferrites, manganites; 18-22, carbonates; 23-37, silicates; 

 38, titanates, columbates, and tautalates; 39, nitrates and vanadates; 

 40-42, phosphates and arsenates; 43-45, sulphates; 40, chromates, 

 molybdates, tungstates, and uranates. The several special collections, 

 which may be recognized by their case labels, are contained in the cases 

 marked A, B, C, D, E, F, etc., in the plan (Plate 1). The wall case W 

 on the west side of the hall contains the comparative series. 



