SAUSSURITE [p. 254].-According to von Rath (Pogg., xcv, 555) the Saussurite from the greenstone of Neurode in Silesia, has the cleavage, hardness, and tabular twins of Labradorite; color mostly porcelain white. G. in powder, 2·998, in small fragments 2.991.

Mg 0-22

K Na 0.61 4.68

ign.

Si Al Fe Ča 50.84 26.00 2.73 14.95 Oxygen 26.42 12.14 0.82 4.26 0.09 0.10 1.21

1.21101.24

Forms with hornblende (uralite) the greenstone of Neurode; see hornblende above.

SCAPOLITE [p. 201]-Kokscharov makes 0:1 in scapolite 148° 10', 1:1=136° 11'. (Min. Russl., ii, 82.) Se farther, Meionite.

In Am. J. Sci., [2], xix, 428, and Phil. Mag., [4], ix, 382, Mr. T. S. Hunt gives some results, and aims to show that Wilsonite is a distinct species.

In Am. J. Sci., [2], xx, 269, a reëxamination of Wilsonite, by E. J. Chapman, showing that its crystallization and other characters are those of Scapolite.

SCHEERERITE [p. 471].-Crystallization according to Kenngott (Min. Not., No. 15) of the Scheererite of Uznach in Switzerland, monoclinic; crystals very small, thin, and slender prismatic, having a hemipyramid in front and a hemidome behind at the extremity. Front edge of prism on face of hemidome 101° 30′; on edge of hemipyramid 123° 30'.

SCLERETINITE.-See Pyroretin.

SERPENTINE [p. 282].-Analyses by S. Haughton (Phil. Mag., [4], x. 253) of the serpentine (1.) of Cornwall called serpentine porphyry, the red earth base being taken: (2.) of Galway; (3.) of Zermatt, Switzerland; (4.) of Syria:

A so-called soapstone from Cornwall, afforded Mr. Haughton (loc. cit.), Si 42-4742-10, Al 6·65-767, Mg 28-83-30·57, 19-37-1846. Oxygen ratio deduced for R, B, Si, Ĥ, 1 : 0-27: 1·92: 1.49 and 1:0.27:18: 1:34.

SILVER ORES.-Ores of Chili, J. L. Smith in Gilliss's Exped., ii, 94.

SMALTINE [p. 56].—Analysis of specimen from Atacama by J. L. Smith (Gilliss's Exped, ii, 102):

As 70-85

Co 24:13 Fe 4.05 Cu 8:41 Ni 1-23 S 0.08 100-75. Kenngott has observed cubic crystals of Smaltine, whose faces were convex and presented distinct traces of planes of a tetrahexahedron (Min. Not., No. 14, Sitz, Wien, xiii, 462).

SODALITE [p. 229].-Loc. in Russia, Kokscharov (Min. Russl., i, 224).

SORDAWALITE [p. 177].—Analysis by Wandesleben (N. Jahrb. Pharm., i, 33, in Lieb. u. Kopp., 1854, 842):

Si 47.70 Al 16-65 Fe 21-32

Mg 10.21 P 2.26-98.14

SPINEL [p. 103].-Loc. in Russia, Kokscharov (Min. Russl., i, 211). STEPHANITE [p. 86].-Crystallization of Stephanite by F. H. Schroeder (Pogg., xcv, 257). An elaborate paper describing many new forms, simple and compound, giving a large number of angles. The following are the simple forms: O, iì, 87, Hí, 71, 41, 21, lì, ì, ¿11, 2211, 39, 17, 15-5, 25, 15, 84, iš, 13, 13, 73, 42, ž, a 2, 5ž, ž, 6ž, I, 1, 4, †, d, †, is, 33, 3, ii, 11.-The angle I&I=

115° 39', 0:1=127° 51'.

SULPHUR (p. 22].—Loc. in California, Am. J. Sci., [2], xx, 84.

SVANBERGITE-Announced as a new mineral by Igelström (Oefv. Ak. Förh., 1854, p. 156, and J. f. pr. Chem., Ixiv, 252). Occurs in Wermland, in a gangue with kyanite, pyrophyllite,`mica, quartz, and iron glance. Crystallization monoclinic,

semitransparent. Cleavage distinct and parallel to the base. Color, and color of powder, pale red. G.-3.30. H.-5. Composition according to Igelström:

BB. on coal fuses only on the thinnest edges: a red hepatic mass with soda in the reduction flame, which becomes green with water, and with dilute acid develops sulphuretted hydrogen. In borax easily soluble to an iron-colored glass. With salt of phosphorus a colorless glass. With cobalt solution fine blue.

SYLVINE [p. 90]-The occurrence of pure chlorid of potash at Vesuvius with remarks, A. Müller, Verh. Nat. Gesselsch. in Basel, 1854, 113. It is without a trace of lime, magnesia, and alumina and contains only a trace of soda.

TANNERITE [p. 73]-This species is named Emplektite by Kenngott in his Min. Forsch. for 1853, published in 1855.

TAURISCITE, Volger. A new iron-vitriol. Description by G. H. O. Volger (Leonh. u. Bronn. Jahrb., 1855, p. 152). Trimetric. In slender white or glassy prisms; form near that of epsomite. Occurring planes, ∞∞, 1-∞, ∞.2, 2.2, ∞, 2, 1, 2.2, 0-0, 1-∞, or in letters, i, 1, i2, 22, 1, 2, 1, 22, ii, 1. Formed along with Melanterite from the decomposition of pyrites, in the Windgalle, St. Gothard.

TENNANTITE [p. 84].-A mineral probably tennantite at Lancaster, Pa., W. J. Taylor, in Am. J. Sci., xx, 412.

TETRAHEDRITE [p. 82].-Analysis of a Tetrahedrite, containing quicksilver, by G. von Rath (Pogg., xcvi, 322).

As Bi

1. 22.54 3.18 0.96 2. 22.11 3.13 0.66 3. 22.94 2:50 (0-96)

Sb 18.56

19.54

19·93

Cu Pb Zn Fe Hg 3542 (0.21) 0.64 0.80 17:27 99-58 34 83 0.21 0.75 099 (1727) 99:51 35.76 (0.21) 0.67 0.81 (1727)=101·05

Sulphur of arsenic, bismuth and antimony, to sulphur of other metals, as, (1), 2.95:4; (2), 3·04:4; (3), 295: 4. Formula 4MS+(Sb, As, Bi)?S3, in which Eu is to the sum of the other basic metals as 25: 1.

Specimen a crystal weighing about 13 grammes. G. 5'070, or in powder 5.356. Color light steel gray.

Von Rath also reviews the earlier analyses.

Analysis of Tetrahedrite of Freiberg, Saxony, by J. Wandesleben (N. Jahrb. Pharm., ii, 105, and Lieb. u. Kopp, 1854, 814). S 27-27, Sb 17:40, As 2·40, Cu 42·02, Fe 841, Zn 1·89, Ag 0·06=99-45.

Analysis of the ore from Chile by J. L. Smith (Gilliss's Exped., ii, 91): S 26-83, Sb 23.21, As 3·05, Cu 36:02, Fe 2:36, Zn 4·52, Ag 3·41=99-40.

The ore from Coquimbo analyzed by F. Field has been named Fieldite by Kenngott, Min. Forsch., for 1853, p. 126.

TITANIC IRON [P. 115]-Analysis of ore from Wermland, by J. Igelström (J. f. pr. Chem., Ixiv, 62). Ti 15.76, Fe 84-24. Occurs in quartz rock in small grains.

TOMBAZITE. According to Kenngott (Min. Not., No. 14), Trombazite from Lobenstein is much like Nickeline, or nickel green, having a greenish color and giving out arsenous acid before the blowpipe in a glass tube, with no sulphur; and on charcoal it acts like nickeline.

TOURMALINE [p. 270]-Kenngott describes a compound crystal of Tourmaline from Brazil, which consists of an interior triangular prism with replaced edges (∞P) enclosed by the hexagonal prism P2, only on three edges of which occur the planes P.

Loc. of tourmaline in California, Am. J. Sci., [2], xx, 84.

Zeuxite is referred to this species by R. P. Greg (Phil. Mag., [4], x, 118).

VANADATE OF LEAD [p. 362].-Analysis of vanadate from Phoenixville, Pa., J. L. Smith, xx, 246.

VOSGITE, see Feldspar.

WEBSTERITE OF ALUMINITE [p. 389].-The so-called paraluminite, according to Kenngott, is nothing but aluminite (Min. Not., No. 16).

WILSONITE, See Scapolite.

WÖLCHITE [p. 82].-The Wölchite from St. Gestrand, occurs according to Kenngott (Min. Not., No. 14) in trimetric prisms, affording the planes, ∞, ∞-∞, m-∞, m2-∞, O, or in letters I, iì, mì, m'i, Ô. I: I=93° 30', 0: mì=1464°, 0:m'i—141° approximately. G.-5.828. The form is near that of Bournonite, but the composition appears to be different. Analysis by Schrotter, recalculated by Kenngott.

corresponding to 17.8 sulphur, 08 As3, 13 Sb2, 27 Eu, 2.9 Pb, 0.5 Fe, or 178 S, 21 As2+Sb2, 6·1 Єu+Pb+Fe. Kenngott takes the ratio as at 8S: 1 (As2, Sb',) : 3(Eu, Fe, Pb). It is more nearly 9:1:3; but the mineral requires a new investigation.

WOLFRAM [p. 351].-The analysis, Suppl. I, p. 18 (this Jour., vol. xix, p. 370) is by Petzold in a notice by Schneider.

WOLLASTONITE [p. 156].-Analysis of Wollastonite from the Morne Mts., by Mr. F. Heddle (Phil. Mag., [4], ix, 452):

Ča 42.50 0.84 43.92

The mineral contains a little mixed carbonate of lime.

WULFENITE [p. 849].-Analysis and crystal of Wulfenite from Phoenixville, Pa., J. L. Smith, xx, 245.

XENOTIME [p. 401].-Twin of Xenotime with Malacone, Zschau, Am. J. Sci., xx,

273.

nickel, but not Color dull emePowder apple

ZAMTITE, A. Casares.-Supposed to be a hydrous carbonate of yet analyzed. Resembles the emerald nickel, and is from Spain. rald-green. Not crystallized. May be scratched with a knife. green. Lustre waxy, or somewhat vitreous. BB. blackens but does not fuse; with soda and a little borax affords a metallic globule of a dull yellow color; which is magnetic and has the properties of nickel. In a tube yields water. Kenngott's Min. Forsch. for 1853, p. 22. [See Min., p. 457.-D.]

ZEUXITE [p. 270].-See Tourmaline.

ZINCITE (or RED ZINC ORE) [p. 110].-Isomorphism with Greenockite, Kenngott, Min. Not., No. 17.

ART. XXV.-On a new locality of Meteoric Iron, in the Orange River Country, South Africa, and a supposed new locality of the same, in Mexico; by CHARLES UPHAM SHEPARD, M.D.

THIS fine meteoric iron mass was brought to London from the Cape of Good Hope, in August last, by the master of a Scottish ship, to whom it had been intrusted by a farmer of the Orange river district, where the mass is supposed to have been recently discovered. It was taken directly to Prof. Tennant, by whom it was purchased; and a few days subsequently was transferred to my possession,-this being the second large metallic meteorite from Africa, which I owe to the same source.

Its weight is 328 pounds. Its figure in one position, as shown by the drawing of Mr. Robert Bakewell here given, is somewhat cubical or block-like, though exhibiting very blunt edges, and upon one side, a very remarkable gash, or reëntering angle.

The indentations of the surface are strongly marked. The depressions are large, and strikingly uniform throughout in their dimensions.

Upon the top of the mass, as represented in fig. 1, there is a broad plate-shaped depression (itself made up of many sinaller ones), which is surrounded at its brim with a double series of elongated concavities, each one of which points with its longer diameter, towards the centre of the general concavity. There are no sharp edges or asperities connected with the block, for which reason, it reminds one of a freshly made and highly perfect casting of bronze or of cast-iron.

There is also an almost perfect absence of oxydation over the entire surface, which in place of the usual coating of hydrated oxyd of iron, exhibits a thin black crust, closely adhering to the mass, and not thicker than wrapping paper. In this respect it strikingly resembles the Braunau meteoric iron; and leads to the surmise that the mass is of recent origin.

Fig. 2. represents the block in an inverted position, which owing to an anvil-like projection of one of its angles, produces some modification in its general appearance. It brings into view also, a singular opening (a) perfectly circular in form, and about three quarters of an inch in diameter, and the same in depth. This opening is slightly concave at bottom, and has at its centre a small projecting pimple; the whole seems to have been wrought artificially; and yet it bears no mark of any tool or instrument, by which it could have been done.

It is sawed with less difficulty than most meteoric irons, being unusually homogeneous in its texture. It is perfectly crystalline in structure, throughout; and apparently the crystallization of the entire block is conformable to the planes of a single individual. Cleavages are effected with facility, giving rise to octahedral and tetrahedral fragments. The polished surfaces show no tendency to oxydation before or after etching; and present an uncommonly white color. When etched, it reveals a regularity of crystallizations wholly unsurpassed; and most resembles that of the Putnam county (Ga.) iron, although the lines and bands of the Orange River iron are much bolder and more strongly marked, than in that from Georgia.

The specific gravity, as determined upon a single specimen weighing sixty grains, is 7.3. But I believe this below the average; and a more satisfactory determination of this property is reserved to a future occasion.

Thus far, I have discovered no indication of the presence of sulphur. No examination was made for tin or copper. In dissolving in dilute nitro-hydrochloric acid, a small residuum was left, which consisted chiefly of nearly round, semitransparent grains of a mineral, which I consider identical with chladnite;