1883.] 345 [Annual Meeting. 



{Label I.) 



Streak Series. 



Lustre metallic, and color mainly essential. 



{Label 2.) 



Streak Series. 



Lustre non-metallic, and color non-essential except when white. 



{b). Label No. 1, stands at the head of nine specimens, each 

 mounted upon the same block, with a piece of Novaculite of uniform 

 size, such as is used to try the streak of the minerals, partly covered 

 with a band of the powdered mineral. Label No. 2 is at the head 

 of a precisely similar series, but consisting of eighteen minerals 

 with their accompanying stones, exhibiting the great contrast 

 between the color of minerals themselves, and of their streaks 

 upon the white surfaces of the Novaculite. 



(c). There are series of specimens, showing the principal minerals 

 which exhibit electrical properties either in their natural condi- 

 tions or only when acted upon by friction or heat. 



{d). Even the taste, feel, and odor of minerals are dealt with by 

 similar series. 



Though any one cannot imagine how a mineral may taste, sim- 

 ply from the sight of it, or what its feel is, or how it smells, every 

 one knows some of the common minerals of the same series with 

 which it is placed on exhibition. One can also, with the guid- 

 ance of the collection, more easily duplicate the specimens and 

 understand their relations. 



Part II. The Synopsis of classification is arranged upon narrow 

 shelves attached to a wooden backing of boards. The objects are 

 by this means brought forward in the case and are closer to the 

 glass doors than in the usual rows of broad shelves. The more 

 important and abundant elements are here repeated, and each shelf 

 is devoted to one of the grand divisions of the compound miner- 

 als. Each division of minerals is represented by its most char- 

 acteristic species, and the subdivisions of the groups are indi- 

 cated on the labels wherever these occur. 



Part III. The systematic collection begins with the Native 

 Elements, which occupy one wall case next to the synoptical col- 



