The first mentions! is a double -ait of mmIiuih nitrate 

 the formula Na N0 3 + Na, SO, -f H,0. It contai 

 N 2 5 --- 22.26 ; N:i,<) 3S.27: II <> 7.:'.<». The 

 .and colorless, and is m quadratic tables. LAnterv 

 interesting as being I he first mdate known to Mini 

 composition [I = 64.70; CaO 14.95] oorresponda 

 occurs in well-developed, large prisms, appara 

 imbedded in gypsum or Implanted in the rocki 

 pampa. It is transparent and of a yellowish cole 

 4.59, and it dissolve- quite rea<iily in water. Iodchr 

 liar compound in that it is a double salt of the iodat* 

 calcium, of the formula 7 Ca(IO,) 2 + 8 C'a ( V< >,. ( 

 I,p 5 r= 58.12 ; OO, == 19.00 ; CaO = 22.01. The 

 developed. They are of a deep yellow color, and th 



in water. Paramelaconite and Footeite.— Dr. 



obtained from Bisby, Arizona, several specimens a 

 minerals that have been examined by Koenig. 2 C 

 pyramidal crystals, set in a mass of indigo blue need 

 a mammillary substance composed of a mixture of 

 onite. The dark crystals, named paramelaconite, an 

 a pvramidal habit resembling that of Brazilian anat 

 ratio a : c = 1 : 1 .604:3. The hardness of the new n 

 as that of apatite. Its streak is black, and its 

 CuO = 87.66; Cu,0 = 11.70; Fe 2 3 - .64. Sin. 

 such large quantity and .-nice it was found to me u < 

 cuprite, the author concludes that the mineral is a 

 onite. The indigo blue needles are ruonoclinic 

 oo P» , oo P X P, Vac and Pdc , with an hexagona 

 the crystals are twins, like those of harmotome. 



*Zats.f. Kryst, xi.x, 1891, p. 447. 



*Z*ts. f. Kryst, xix, p. 595. 



