known as Derbyshire spar, of which many useful articles are
manufactured in this country. Ladies particularly will halt with
interest before the case marked 58 A, where the fluorides, better
known as the topaz, are deposited. These include a fine series of
crystals from the Brazils, Siberia, and Saxony.

The 59th case is covered with Chlorides, or combinations of chlorine
with other substances, including rock salt, or chloride of sodium;
sal-ammoniac from Vesuvius; fine chloride of copper, exhibiting
beautiful crystals; and chlorides of silver and mercury. The two last
cases in the room (60 and 60 A) contain samples of coal, bitumen,
resins, and salts. Here will be found the honey-stone of Thuringia;
crystals of phosphate of magnesia and ammonia called struvite;
beautiful specimens of amber, some pieces of which inclose insects;
and copal, also containing insects; fossil copal; mineral pitch, from
naphtha to asphalt; the elastic bitumen of Derbyshire, exhibiting its
different degrees of softness; Humboldt's dapèche, an inflammable
fossil of South America; and brown and black coal. Having noticed all
these varieties, the visitor should advance at once westward into the
second room of the mineralogical gallery.

Here, against the southern wall, are groups of

FOSSIL ANIMALS

ranged inside and upon the top of the wall cases. The most remarkable
of the remains inclosed in the wall cases of this room are the remains
of the carapace and other portions of the gigantic Fossil Tortoise
from the Sewalik Hills, Bengal, discovered by the enterprising Major
Cautley; and the gigantic fossil bones of an extinct genus of birds