46J: 



SCIENCE. 



[Vol. I., No. 16. 



iodide in presence of a bromide. Iti a mixture of the 

 three haloid salts, both bromine and iodine may be 

 removed by plumbic peroxide; or first the iodine by 

 manganic peroxide, and then the bromine by plumbic 

 peroxide. These methods fail to give accurate results 

 wheu the relative percentage of chlorine is small. — 

 {SUzungsber. kais. akad. Wien, Ixxxvi. 244.) c. P. M. 



[927 

 AGBICULTUBE. 



By-products from rice. — The chief by-prod- 

 ucts of the preparation of rice for market are 

 'douse,' or bran, 'rice-flour,' and 'polish.' The 

 bran consists of the hull, or pericarp, with a portion 

 of the outer proteine-bearing layer of the true seed 

 adhering to it. The rice-flour is produced by pound- 

 ing the grain, freed from the hull, in wooden mortars, 

 to complete the removal of the testa and proteine- 

 bearing layer of the seed. It consists of the latter 

 mixed with more or less of the starchy interior por- 

 tion of the seed. The rice then passes under stiff 

 brushes, which remove the last traces of the outer 

 layer, and more or less starch. The refuse from this 

 process is the rice polish. Analyses of these mate- 

 rials indicate that they are valuable feeding-stuffs, and 

 show them to be decidedly rich in fat and proteine. — 

 {Eep. N. C. exp. slat., 1S82, 87.) ii. p. A. [928 



Analyses of cotton-seed. — The following analy- 

 ses of the hulls and kernels of cotton-seed were made 

 at the North Carolina agricultural experiment-sta- 

 tion. 



The whole seed consists of about equal parts of 

 kernels and hulls. The ash of both hulls and ker- 

 nels is very rich in potash and phosphoric acid. — 

 {Rep. N. O. exp. slat., 1882, 97.) h. p. a. [929 



GEOLOGY. 



Lithology. 



The Rastenberg granite. — This rock, microscop- 

 ically studied by Roller, is a porphyritic granite com- 

 posed of quartz, orthoclase, plagioclase, biotite, and 

 hornblende. These form a medium crystalline mass 

 in which large orthoclase crystals are embedded. 

 Dihexahedral quartz, which is usually present in such 

 rocks, was absent from this. The orthoclase was 

 found to belong to the microperthite variety. While 

 the large crystals were orthoclase, the smaller ones 

 were mostly plagioclase, lying between oligoclase and 

 albite, or, according to Tschermak's theory, between 

 Ab ,An and Ab^Auj. The absorption and pleochro- 

 ism of the hornbleiule were not strong. The colors 

 were, for a, light yellowish-brown; t, clear grass- 

 green; 6, dark brownish-yellow; while a < c < b. — 

 (Min. petro;/. mitth., v. 215.) M. e. w. [930 



The rocks of the Wechsels. — In a paper relat- 

 ing to the lilhology of the Wecliselgebirge, by Bohm, 

 the rocks are classified as, 1°. Micaceous rocks, divid- 

 ed into albite-gneiss, granulitic-albite-gneiss, mica- 

 schist, epidotic-mica-schist, and quartzite; 2°. Chlo- 

 ritic rocks, into chlorite-gneiss and chlorite-schist; 

 3°. Hornblendio rocks, into diorite-schist and horn- 

 blende-epidote-schist. Descriptions of the micro- 

 •scopic characters are given. Rutileand titanite were 



found in the roclcs, while an observed indistinct 

 striation of the quartz was said to be caused by 

 fluid or glass inclusions. — [Min. petrog. miWi., v. 

 197.) M. IS. w. [931 



RhyoUte from Yello-wstone Park. — Chemical 

 analyses of two specimens of rhyolite have been made 

 by Mr. W. Beam with the following results : — 



Since but little ferric oxide was obtained, it was esti- 

 mated with the aluminia. The rock in the first 

 analysis is stated to be a porphyritic obsidian, and, 

 in the second, a quartz trachyte. These names and 

 the analyses indicate that the rocks are rhyolites. — 

 {Amer. journ. sc, xxv. 106.) m. e. w. [932 



Meteorites. 

 The Atacama (Bolivia) meteorite. — This sup- 

 posed meteorite has been regarded as a pallasite or 

 syssiderite (Science, p. 41)', according as the classifi- 

 cation of G. Eose or Daubr^e is followed, closely 

 allied to the Siberian form found by Pallas. Dr. S. 

 Meunier dissents from this opinion, although hold- 

 ing that both are specimens of concretionary veins 

 (Science, p. 18), — a view for which the present writer 

 is unable to see any basis. A chemical and minera- 

 logical examination showed, according to Meunier, 

 that the non-metallic part had the following composi- 

 tion : — 



Pyroxene 9.00 



Schreibersite 4.00 



Chromite 1.20 



Anorthite 0.10 



Pyrrhotite 0.50 



Olivine 85.20 



100.00 

 — { Comptes rendus, xcv. iSSi.) M. E. w. [933 



The Mocs meteorite. — Professor A. Koch has 

 continued his papers on the fall of meteoric stones in 

 the vicinity of Mocs in the Siebenbiirgen, Feb. 3, 1882. 



He reports from this fall 912 pieces, weighing col- 

 lectively 174,113 gr. A chemical analysis, made by 

 his bi'other, Frank Koch, showed that their average 

 composition was as follows : — 



Koch states that the meteorite fragments are com- 

 posed of nickeliferous iron, magnetic pyrites, taenite, 

 and silicates. The chemical analysis indicates that 

 they belong to the peridotites. — {Min. peirog. mitth., 

 V. 234.) M. E. w. [934 



MINERALOGY. 



LoUingite. — Mr. W. F. Hillebrand described an 

 interesting variety of this mineral, recently found 

 on Teocali Creek, Gunnison County, Col. It occurs 

 in aggregates of spheroidal bodies, showing radiate 

 structure when broken, in a gangue of calcite or ba- 



