136 
Transactions Texas Academy of Science. 
Herndon, J. H. 
“The second iron field is the Steen Saline or Lindale bed. 
'IS- * * -»• •!>- * 
“The third bed is on Price’s survey, still further east o^f Lindale. 
-Jr ^ 
“East of Winona and northwest ot Starrville is .another quite extensive 
bed of ore. 
•if -jf -K- -se* -x- -s'i- 
“Eight miles northeast of Tyler is another smaller outcropping of good 
ore. 
* * * * * * * 
“The last locality is that of the Grandy Mountain between Bullard and 
Troupe.” 
193. Hidden, William Earl, and Mackintosh, J. B. 
A Description of S'everal Yttria and Thoria Minerals from Llano 
'County, Texas. 
Amer. Jour, of Science, III, Yol. XXXYIII, pp. 474-486. 
Xew Haven, Dec., 1889. 
History of the Discovery of G-adolinite, July, 1886, by J. J. Barringer, 
in Llano county, Texas. Description of the Locality. Occurrence of rare 
iMinerals.. Description.s of Minerals: Quartz, Hyalite, Orthoclase, Albite, 
Biotite ( ? ) , Muscovite, Magnetite, Martite, G-adolinite, Yttrialite, a new 
Thorium-Yttrium Silicate: 
“The mineral which we have named Yttrialite was diseovered associated 
with, and often upon, the gadolinite, and but for its characteristic orange- 
yellow surface alteration (that of gadolinite immediately alongside 
of it being invardaibly of a dull brick red color) it might have con- 
tinued to pass for ‘^green-gadolinite,’ which was the local name given to it. 
Of these yellowish masses one weighed over ten pounds, and twenty kilos 
were found in all. Upon being broken open they are of an olive-green color, 
tending in places to a drab shade. Peculiar minute ragged lines permeate 
.the mineral in all directions, causing an apparent muddiness or semi- 
opacity. No crystals have as yet been observed, but a seemingly ortho- 
rhombic symmetry was apparent in some of the masses. The mineral 
breaks easily in two directions with a shell-like fracture, but .separates into 
ismall flakes very readily.. (Gadolinite is broken only with difficulty.) 
Nothing like a cleavage has been noticed. A thin white crust of a mineral 
related to tengerite occupies the cracks in the mineral, and this is equally 
true concerning the gadolinite of the locality, as Genth has already noted. 
We have named the mineral yttrialite, in allusion to the proruinent .part 
]3layed by the yttria earths in its composition. 
“The specific gravity is 4..575; hardness=5 — '5.5. It is readily soluble in - 
hydrochloric .acid. When heated over the Bunsen flame it decrepitates 
violently, and falls to powder upon being ignited over a blast, becoming 
snufi'-brown, infusible and insoluble. These characteristics serve to at 
once distinguish it from gadolinite, whch has specific gravity from 4.2 to 
4.3 (Texas varieties), and which, when heated, .glows vividly and swells 
into ragged fragments. The analysis shows severa.l fractions of the 
