256 Third Supplement to Dana’s Mineralogy. 
Another of the so-called specie is named Glaubapatite. It is described as occur- 
ring in small tabular crystals, and in druses, forming botryoidal and stalactitie - 
masses, with columnar radiating flattened fibres ; also massive ; —- r pale yellowish 
or greenish-brown; translucent; H.=3'5; G.=2°6. Also chocolate-brown to nearly 
black when massive. Chemical examination afforded, redhat ‘of ser 74:00, sul- 
phate of soda 15°10, water 10°30, organic matter, sulphate of lime and chlorid of 
rdium, a Sabor =99'40, [From the composition obtained, it can hardly be a chemi- 
cal com 
Epiglowdite is Bo name of the third guano product. It occurs “in small aggre- 
gates or interlac asses of te semitransparent sabrnal of a shining vitreous 
lustre, which are pms yplanted upon druses of glaubapatite. H. about 2°5.” It 
upon 
is stated to be “a largely hydrated rs ose opie of lime, <r may also ae 
d hele? save acid, 
magnesia an. n dilute m B.B. fuses easily to a 
transparent colorless glass ee g dan ti 
Gypsum [p. ac and Suppl 1]—Gray’s Cave, Sumner Co., Tennessee, affords 
fine specimens of selenite, snowy gypsum, and “ alabaster rosettes.” —Safford’s Rep., 
p. 119. 
HARRISITE, @. U. Shepard—A sulphuret of copper, like copper glance in com- 
seg but cubic in cleavage like the artificial sulphuret. Occurs in in imperfee tly 
edrons, and also disseminated in seams and massive. lor 
grayish-black. G@==5-4. Occurs at the Canton Mine, Georgia, with galena in — 
ii aie idan of staurotide. A mass of 50 lbs. has Sas ou out.—(Rep. on Can- 
Heppuire,—See under Conistonire. 
_ Hematire or Sprcutar _ [p. 113, a Suppl. 1].—Scacchi has made 
Besides these, there are octahedral crystals, some ‘eo their edges truncated, 
which are very brilliant, and according to exact measurement the octahedrons are 
regular or aa ae ese octahedrons are int aaeited, i intricately so, by 
microscopic lamin which cut through para foe . the octahedral faces, and - 
nit edro 
The specular iron of the oo has often some magnetic qualities. 8 lamellar variety 
of the eruption of May, 1855, does not affect the magnetic needle, but manifests 
sensibly polar magnetism with the * Conan mete bohedral crystals with 
cate ment — the valley of Cancherone, stals from 
he needle, an lar wit ea A gro up 0 
tals roa: the same eh a united o <odh of hematite, is notabl y magne tic and 
magnetipolar. Octahedral 6, oo intersected by lamelle of hematite are strongly 
magnetic “ vee sibly magnetipolar. stalactites £7 hematite vary much ia 
Ir iG. qua - 
Prof. Scace’ sarc whether an: . he cr ono are psendom and whether 
they are magnetite altered to hema’ of oF ema te to mete A He says the 
first is not probable, as hematite is “the sak pestis f sublimation about the 
voleano; and the second cannot be, as the wpetals then shesuldl be all rhombo! 
bac gea he se the sesquioxyd of iron is dimorphous: but on this point more evi- 
requi 
co Cut (4) Nin C. U. Shepard—No description given, exbept as follows Ang” 
n (Ga.) Mine, ae ae white ‘earthy shell, sometimes thicker t 
, On Marcasi a mine affording galena, copper rites pga 
pial nee automolite. “It i is a ‘Sydeets phosphate of nithnina With ae oxyd 
e 
*, 
