GALLERY.] 
NATURAL HISTORY. (Minerals.) 
of iron from Taberg in Smffland, by Sefstrbm : by Del Rio the acid of 
f wh '. ch he called erythronium, had been found, combined „ ,th 
oxide of lead, in the brown lead ore of Zimapan in Mexico. IMr the 
discovery of ih& ytmadate of lead (johmtonite j at Wanloekhead, and 
the analysis of th.s mineral substance, science is indebted to Mr John- 
ston, of Edinburgh. Vanadate of lead from Beresof, Siberia —the 
volborthite of Hess, a vanadate of copper. 
Tff. 39 - ., Mol y bd jf “id and molybdates molybdenum ochre or 
moly belie acid , as a yellow powder on the sulphuret of this metal from 
Sweden, kc.;— molybdate of lead, yellow lead ore, or carinthite, mas- 
sive, lamelhform and crystallized in splendid groups on compact lime- 
stone,. &c. ; chiefly from Bleiberg in Carinthia. 
Oxide of chromium and chromates -—chrome-ochre, from several 
localities;— a suite of specimens of chromate of lead, red lead ore. or 
crocoisite, from the gold mines of Beresof in Siberia, where it chiefly 
occurs in a land of micaceous rock, mixed with particles of quartz and 
brown iron-stone, and from Brazil chromate of lead and copper 
called vauquelimte, a concomitant of the Siberian red lead ore — 
chrome-iron, from the department of Varin France, and from Baltimore 
m Maryland,. intermixed with talc stained purple by chromic acid. 
. Boracic acid, or sassoline (chiefly from Vulcano, one of the Linari 
isles) and borates: borate of soda, the salt known by the names of 
borax and tincal, from Tibet, Monte-rotondo, Tuscany, &c. ;~hayesine 
also called boronatrocalcite, a newly discovered substance, occurring 
accompanied by glaubente and other salts, in the province of Tarapaca 
- eru ; borate of magnesia or boracite in separate crystals, and the 
same embedded in gypsum ;—datolite , being a borate with a tri-silicate 
°* l ime ’ J-° m ^- ren ^ lin Norway ; the variety from Sonthofen (supposed 
to be a distinct species, called humboldtite by Levy) ; and the globular- 
fibrous variety (which has received the name of botryolite), likewise 
from Arendal. y 
Case 40 is set apart for such silicates as contain one or more borates, 
ot which, however, m some cases, it is uncertain how far these may be 
considered as essential component parts.— To this order belong the 
species tourmaline and axinite , Among the red-coloured varieties 
vi j f° r ! Iler > some of which are called rubellite, the most remark- 
able deposited here is a specimen of uncommon form and dimensions 
which was presented by the king of Ava to the late Colonel Symes’ 
when on an embassy to that country ; blue varieties of the same, some 
oi them known by the name of indicolite s a suite of modifications of 
tourmaline crystals of those colours, as well as of others, such as green 
of various shades, among which those from Brazil, Elba, and "from 
Campolongo deserve more particular notice. Of the axinite, Wer- 
ner’s Ihumerstein, very characteristic specimens from Bourg d’Osian 1 ? 
Norway, &c., will be found in this Table Case. 
Case 41 . In this Case begins the order of the Carbonates Carbonate 
of soda, from various localities. — Carbonate of baryta or witherite, among 
the specimens of which may be particularized the beautiful groups of 
double six-sided pyramids, and those of six-sided prismatic crystals. 
— Barytocalcite, from Alston Moor in Cumberland Carbonate of 
strontia, called strontianite, chiefly from Strontian in Argyleshire, in 
prismatic and acicular crystals, which latter have sometimes been mis- 
