184 



PROCEEDINGS OF THE ACADEMY OF 



[iNN'.t. 



Chloanthite, Ndcolite, De Sau/esite, Annabergite, Tephrowillemite, 

 Fluorite and Aquatite from Franklin, N. J. — Professor George 

 A. Koenig stated that on a recent visit to Franklin he obtained from 

 Major de Saules, the manager of the Trotter mine, material of a re- 

 cent find of nickel ore, in which he identified the above species, of 

 which two are new and the others have not been observed hereto- 

 fore at this locality. At a depth of 340 feet the shaft passed 

 through a stratum of yellow garnet. Under this a considerable 

 nest of sphalerite and fluorite was met with and with these the bunch 

 of nickel ore was associated, probably 3<J pounds. The first and only 

 observation that nickel and cobalt are found at Franklin, dates 

 from 1876, when the speaker described the product of alteration of 

 Jeffersonite under the name of Anomalite (Amer. Inst, of Mining 

 Engineers, 1876). From this substance the reaction of manganese 

 in borax and salt of phosphorus could not be obtained, although it 

 contains over '60% of this metal. The cause of this lies in the pres- 

 ence of nickel and cobalt (about 3%) which together give a green 

 color to the glass and this being complementary to the red of the 

 manganese, extinction results. The present find of nickel minerals 

 is, then, not unexpected, but very interesting. 



1. Chloanthite. — Forms the main bulk. It is chiefly massive, in 

 thin layers, having a very thin interposition of calcite. The color 

 of the massive portion is light steel-gray. On one specimen, the 

 mineral is bordered by eleavable calcite. All along the border 

 minute white crystals of metallic lustre are imbedded in the calcite. 



Their habitus is generally 

 prismatic. Fortunately the 

 speaker observed one crystal, 

 ]'. inch length of edge, which 

 could be chiseled out from the 

 matrix and was large enough 

 to afford goniometric measure- 

 ments. The figure shows this 

 crystal in linear enlargement 

 of 1: 18. The crystal is broken 

 off at the left and at the back. 

 On the right front a sjnall 

 crystal appears. 



The right front face O and all others of the same position show 

 small protuberances and do not reflect the light completely. How- 

 ever, the reflections obtained were in the main satisfactory. 

 Edge (e) = 70° 24' 



Edge (/) = : 70° 35' (theoretically 70° 33') 

 The face (6) is very narrow, striated, and it reflects a drawn 

 image. 



a :b^ 55° (54° 44') b : c = 54° 30' (54° 44') 

 a:c 109° 30' (109° 28') 

 a : d = 180° 



oo o oo 



