SCO 
lieconh of the Geoloifcal Survey of India. 
[vOL. XT. 
Senaemontite prom Sarawak. 
When recently arranging the Indian and foreign ores of antimonj- in the 
Geological Museum, I found, amongst those from Saraw’ak, in Borneo, which 
consist mainly of the sulphide and native antimony, a specimen which contains 
more than one oxide. It is about half a pound in weight, and consists of native 
antimony with stibmte, gi-eyish-white and grey filamentous tufts, which appecar 
to be volentinite, but which are only distinctly visible under the lens, and cannot 
be isolated for examination, senarmontite and cervmitite. The first four are rather 
intimately mixed up, but small fragments of the senarmontite are separable, suffi¬ 
ciently large for satisfactory determination. It occurs both massive and in 
crystals, which are unmodified octoJiodrons : the larger of these are about a 
fiftieth of an inch in diameter; the hardness is about 2, the colour of the massive 
portion is white and greyish, with resinous lustre; the crystals are grey and 
translucent, with sub-adamantine lustre on the faces. On charcoal the mineral 
gives an abiindant coating of antimonious oxide; it dissolves in hydrochloric 
acid, the solution yielding a white precipitate w’ith water and an orange-red one 
with hydrosulphuric acid. I am not aware that senarmontite has been previously 
noticed from Sarawak, and hence put the above observation on record. 
V. R. MALLET. 
ADDITIONS TO THE LIBRARY. 
Erom 1st April to SOtii June 1878. 
Titles of Bool'S. Donors. 
Ansted, D. T.— -Geological Science (1856), 8vo, London. 
H. B. Medlicott, Esq. 
Articles on the Geology of portions of the Bombay Presidency, written for the 
Bombay Gazetteer (1878), 8vo, Bombay. 
W. T. Blanfoed, Esq. 
Douglas, S. H., and Prescott, A. B.—Qualitative Chemical Analysis, 2nd Edi¬ 
tion (187G), 8vo, New York. 
Gaudry, Albert. —Les Enchaincments du Monde animal dans les temps geolo- 
giques : Mammiferes Tertiaires (1878), 8vo, Paris. 
Heek, Oswald. —Flora Fossilis Helvetias, Die Vorweltliche Flom der Schweiz. 
Lief. Ill (1877), 4to, Zurich. 
Humphry, G. M.—Observations on the limbs of Vertebrate Animals (1860), 4to, 
Cambridge. 
R. Ltdekkee, Esq. 
Lyman, B. S.—General Report on the Geology of Yesso (1877), 8vo, Tokei. 
The Author. 
