1872.] Mineralogy. 521 
After all, the author admits that the deficiency may be due to an analytical 
error. As tungsten and iron are evidently the main constituents of this 
mineral, the name Ferro-tungstine has been provisionaily adopted. Mr. Tamm 
had indeed proposed that it should be termed Crookesite, but it will be 
remembered by our mineralogical readers that this name has already been 
appropriated to a Swedish species unusually rich in thallium, described a few 
years ago by Prof. Nordenskjold.* Under these circumstances Mr. Crookes 
Suggests that, as soon as the missing constituent be identified, the new 
mineral may appropriately be designated Tammuite. 
In compliment to the Keeper of Minerals at the British Museum, the name 
of Maskelynite has been bestowed by Dr. Tschermak on a colourless cubic 
silicate, having the composition of labradorite, from a meteorite which fell at 
Shergotty in India, on the 25th August, 1865. The maskelynite is accom- 
panied by augite and magnetite. Tschermak has also described a meteorite 
which fell near Gopalpoor on May 23rd, 1865, and which consists of nickel- 
iron, magnetic pyrites, chromite, chrysolite, bronzite, and a mineral resem- 
bling felspar. 
During the Swedish Expedition to Greenland, in 1870, it was observed that 
many of the holes in the ice were covered at the bottom with a peculiar 
deposit in the form of a grey powder, often agglomerated into small globular 
masses. This glacial sand has been examined both microscopically and che- 
mically. It does not possess the characters of a clay, but the main ingredient 
seems to be a sandy trachytic mineral, for which Prof. Nordenskjéld suggests 
the name Kryokonite. The origin of this ice-dust appears enigmatical: 
whether it comes from the basalt region near the coast, or from the supposed 
volcanic tracts in the interior of Greenland, or whether it is of meteoric origin, 
are questions which the Professor at present hesitates to answer. 
Under the name of Manganophyll, Herr Igelstrom has described a new 
species of mica from theiron and manganese mine of Pajsberg, near Filipstadt, 
in Sweden. It possesses a colour varying from bronze to copper-red, and 
appears to crystallise in the hexagonal system. It contains 21°4 per cent of 
protoxide of manganese, and is hence the richest manganese-mica hitherto 
known. Manganophyll appears to stand very close to Breithaupt’s Alurgite, 
from the manganese mines of St. Marcel, in Piedmont; and it is likely enough 
that the two species may be united. 
A preliminary notice of a new lead-ore has been published, in Leonhard 
and Geinitz’s ¥ahrbuch, by Dr. Laspeyres. It seems to be a hydrated sul- 
phato-carbonate of lead, a compound entirely novel in the mineral kingdom. 
The new species was brought from Sardinia by Herr Max Braun, the well- 
known mining engineer at the Vieille Montagne Company’s zinc mines near 
Aix-la-Chapelle. Unfortunately the name Braunite has been appropriated, as 
every mineralogist knows, to an oxide of manganese; and the Sardinian lead- 
ore is, therefore, to be called Mavxite. 
Some confusion is likely to arise in the application of the name Roepperite, 
aname which has been lately applied by Dr. Kenngott to denote a manga- 
nesian dolomite, described by Roepper, from Stirling Hill, New Jersey; 
whilst Prof. Brush has independently used the same name to designate a 
chrysolite containing zinc, described also by Roepper from the same locality, 
but distinguished by Kenngott as Stirlingite. 
Another new species has been detected by Prof. Wiesbach, of Freiberg, 
among the minerals recently raised at Schneeberg, in Saxony. The mineral 
is an arsenate of uranium and copper, and has been christened Zeunerite. It 
strikingly resembles copper-uranite in its grass-green colour and its crystalline 
form, but of course differs in being an arsenate instead of a phosphate. 
For upwards of thirty years corundum has been recognised at several of the 
gold-washings in the mountainous countries of North Carolina and Georgia, 
in the United States. But within the last two or three years, the search for 
* See Quarterly Journal of Science, October, 1867, p. 542. 
VOL. II. (N.S.) 3x 
