94 Dr Brewster on the Existence of Two New Fluids 
Our travellers then drew up the following character of their 
new Crocus variegatus , as contrasted with that of Crocus albi- 
Jlorus. 
Crocus albiflorus , Kitaibel. 
Bulb round, one placed above the 
other, the uppermost ohe the smallest ; 
its coat brownish, composed of a sin- 
gle net-work of fibres, permitting the 
root to be seen through it ; Leaves two, 
rather broad ; Flower of six segments, 
the divisions somewhat long, elliptical, 
blunt ; the three outer ones larger than 
the inner, all white ; the Stigma wedge- 
shaped, slightly 3-cleft, the divisions 
dentate* 
Crocus variegatus, Hoppe & Hornschuch. 
Bulb between ovate and round, one 
placed above the other, the upper one 
the largest ; its outer coat yellowish, 
composed of many layers of fibres, con- 
cealing the root ; Leaves 4, very narrow ; 
Flower of 6 segments, the divisions lan- 
ceolate, acute, all of the same size, pale 
blue, the back of the three outer petals, 
with dark stripes ; spreading out like 
rays; Stigma linear, deeply 3-cleft, the 
divisions bi or trifid. 
Art. X. — On the Existence of Two New Fluids in the Ca- 
vities of Minerals , which are immiscible , and possess re- 
markable Physical Properties. By David Brewster, LL. D 
F. R, S. Loud. & Sec. R. S. Edin. *. 
rjn 
JL HE unpublished memoir, of which we now propose to give 
an abstract, is divided into eight sections, namely, 
Sect. I. — On the existence of a New Fluid in the Cavities 
of Minerals. 
II. — On the coexistence of two Immiscible Fluids, of 
different Physical Properties, in the Cavities of 
Minerals, and accompanied with a Vacuity. 
III. — On the Phenomena of Two Immiscible Fluids 
without a Vacuity in the Cavities of Minerals. 
IV. — On the Changes which these Fluids have under- 
gone in particular Crystals. 
V.— On the Vaporisation and Decomposition of the 
New Fluid at low Temperatures, when enclosed in 
the Cavities of Minerals. 
* The following article is a brief abstract of the larger Memoir, read at the 
Royal Society of Edinburgh, on the 3d and 17th March 1823, and which will ap- 
pear in the 10th volume of the Society’s Transactions, now in the press. 
