ii. 144 ABSTRACTS OF CHEMICAL PAPERS. Miner a l o g i c a1 C h emi s t ryl The Native Elements of the Earth's Crust. VLADIMIR I. VERNADSKI (Certtr. Jlim 191 2 758-765).-The author reproduces with some modifications and extensi0ns.a table from his recent Russian treatise on mineralogy (Opuit Opisatelrtoi Mineralogii part I St. Peters- burg 1908). The main headings in this table are (I) Solid crystalline chemical elements A metals B metalloids ; (11) solid colloidal ele- ments ; (I1 1 ) fluid eleuents ; (IV) gaseous elewents. By including such modifications and combinations as a- p- and y-ferrite a- and P-ferroplatinum bismuth-gold etc. this list is exteuded t o 106 minerals found in the state of native elements. The following forty-wven chemical elements as such occur native Ag Ar As Au Bi Br C Cd C1 Co Cr Cu Pe H He Hg Ir I K? Kr Mn N Na'? Ne Ni Nt 0 Os P? P b Pd Pt Ra? Ru S Sb Se Si? Sn Ta Te TI Zn Xe thorium emanation and actinium emanation.L. J. S. Optical Investigation of Ural Naphtha. MICHAEL A. RAKUZIN (J. Buss. Phys. Chern. Soc. 1912 44 1737-1738).-A sample of naphtha from Dos-Sor D15 0,8754 showed distinct dichroism had a carbonisation constant (K) in benzene (200 mm.) of S.75-4% and yielded distillates which were in all cases inactive. The naphtha is regarded as a perfect natural filter-distillate and the lack of dis- tillate below 150° indicates communication with the atmosphere. T. H. P.MINERALOGICAL CHEMISTRY. ii. 145 W h i t e Sublimates of the Volcano Chinyero (Canaries). ANGEL DEL CAMPO (And. Pis. Quirn.191 2 10 43 1-449). -The sublimates ariqing from the eruption of November. 1909 are pale yellow or pure white crystalline masses interspersed with specks of lava and consist of ammonium chloride (96*2O%) ammonium fluoride (2.45%) ferrous chloride (0.25%) and chlorides of magnesium aluminium etc. (0.70%). Spectrographic examination revealed traces of tin lead silver titanium manganese sodium and perhaps tantalum. G. D. L. An Aluminium Arsenate from Utah. FRANK W. CLARKE (J. Washanyton Acad. Xci. 19 12 2 5 16-5 18).-A white amorphous mineral found with orpiment in the Sunshine mine Mercur district Utah gave (anal. by W. F. Hillebrand) SiO,. A1,0,. Fe,O,. CaO. SrO. MgO. (Ii,Na),O. As2C,. 7'08 26.46 0'64 10.29 2.10 trace 0 12 33.82 P20,. SO,. CO,. F. C1. H20. Total.0.94 0.27 0.88 0'21 trace 17 23 100'04 Of the water 3 22% is lost at l l O o and the remainder below redness. Deducting silica strontianite and gypsum these resiilts correspond with 3(A102H2),As0,,3H,0 + Cw,(AsO,) or with Ca,( A102H2 ),(Ab0,),,5H20. Whether the substance is to be regarded as a simple mineral or as a mixture of liskeardite [ (A102H2)3As0,,5H,0] and berzeliite [Ca3(hs04),] is left undecided. Preslite [ = Tsumebitel a New Mineral from Tsumeb German S o u t b - W e s t Africa. VOJTECH ROSICK~ (Zeitsch. Kryst. &in. l912,51,521-526).-T'he mineral was observed in bmall ernerald- green crystals associated with cbesrylite cerussite calaurine and dolomite. The crystals are imperfectly thveloped and appear t o be orthorhombic (a b c = 0.977 1 0.879) with complex twinning ; D 6.09 H = 3%.A partial analysis by J . Frejka gave PbO. CUO. p,o,. H20. 65.09 11-97 10.26 not det. I n a postscript i t is admitted that this mineral is identical with the L. J. S. recently-described tsumebite of K. Busz (this vol. ii 6 5 ) . L. J. S. Chemical Composition of the Hauynite of the Albanian Hills. NICOLA PARRAVANO (Atti R. Accccd. Lincei 1912 [v] 21 ii 631-633).-The mineral has t h e following composition SiO,. .A1,0,. CaO. Na,O. K20. SO,. C1. Total. 32.18 27'11 10'26 16.34 0.08 14-10 0.31 100.31 The total being arrived at by deducting 0.07 for oxygen replaced by chlorine. This analysis agrees with the formula suggested by Brogger and Backstrom (A 1891 25). K. v. s. Alunogen and Halotrichite. JOHANNES UHLIG (Cent?. Min.1912 723-731 766-776).-8 review is given of the literature of theseii. 146 ABSTRACTS OF CHEMICAL PAPERS. minerals and the following formuh are considered as the most probable alunogen A12!3012,1 6H,O ; halotrichite FeA12S,0,6,24H,0 A sample of "hair-salt from a cave in the Waitopu valley in the Rotorua volcanic district New Zealand is yellowish-white and finely fibrous. Under the microscope it is seen to consist of ' a mixture of fibres of halotrichite (with oblique extinction of 38" and n = 1.49) and scales of alunogen (n= 1.47). D 1-735-1.899. The following analysis corresponds with 48.30% alunogen 41.98 balotrichite with a little free sulphuric acid etc. The material is soluble in water and the insoluble residue consists of 0.70 sulphur 4-15 silicates.AI,O,. Fe,Os. FeO. Na,O. K,O. SO,. H,O. Insol. Total. 11'59 1'24 3'26 0.86 0.53 35.43 43'43 4-85 100.19 Microscopical examination of simiIar materials from other localities shows the frequent intermixture of alunogen and halotrichite together often with some gypsum. L. J. S. Analysis of Garnet f'rom Tavolato. G . SIROVICH ( A t t i R. Accnd. Lincei 19 12 [v] 21 ii 643-645 *').-Two garnets analysed had the following compositions respectively SiO,. TiO,. A1,0,. Fe,O,. FeO. CaO. MgO. Nn,O. H,O. Total. I. 36.74 1-04 5'23 21'10 2-21 31.65 0 96 0'38 0'10 99.41 11. 37.88 096 5'46 21-13 2.17 31'02 0-84 0'29 0.08 99.83 These correspond with the accepted formula for the corriposition of this mineral. R. v. s. Kragerite a Rutile-bearing Rock from Krageroe Norway. THOMAS L. WATSON (Amer. J. Sci. 1912 [iv] 34 50'3-514).-This is a medium-grained rock of light colour and granitic texture consisting mainly of felspar (albite-oligoclase with some microcIine and ortho- clase) much rutile some quartz and a little ilmenite. It is a rutile- bearing aplite and was named kragerite by W. C. Briigger i n 1904. Analysis I by J. W. Watson is of the rock and 11 by W. &I. Thornton of the rutile D 2.225 isolated from it 8. Total. I.* 50-52 25.00 13.98 0'49 0.16 0'34 1.05 6'18 1.00 0.50 trace 0.12 99.34 SiO,. TiO,. A1,0,. Fe,O,. FeO. MgO. CaO. Na,O. K,O. H,O. P,O,. II. 1'06 97.68 - - 0.81 - - - - - - - 100'49 * Also Cr,O 0.39 ; v20 0.55. L. J. S.