Catalogue Raisonné. 
tain rocks, produced by the action of heat. In the present memoir, Dr. 
MacCulloch mentions an additional case which has fallen under his ob- 
servation, in the hearth-stone of a blast furnace, which was split into 
polygonal compartments, specimens of which are in the possession of the 
Duke of Northumberland. He further elucidates the question, by refe- 
rence to the columnar ironstone of Arran, of sandstone below basalt in 
the island of Rum, and the prismatic rock at Dunbar. 
Notice regarding the Salt Lake Inder, in Asiatic Russia. By 
Lieut. J. EK. ALEXANDER, K.L.S. &c.—Edin. New Phil. Journ. 
No. XV. 
John C. G. Herrman, a German botanist, left St. Petersburgh some years 
ago, for the south of Russia, and has never since been heard of. The 
notes contributed in this paper, are from the manuscripts of this natu- 
ralist, which are now in the hands of Mr. Prescott of St. Petersburgh. 
This great magazine of salt is situated at about 26 versts in the Kirghise 
desert, in lat. 48° 30’, and long. 69°. It is elevated above the level of the 
river Ural, and the shores are surrounded by low hills of sandstone, on 
which there is a scanty vegetation, bearing a strong resemblance to that 
of the Caspian Sea, and of the salt and sandy steps around it. The lake, 
which lies as in a basin among the hills, is twenty versts in length, and 
nine broad, and is oval in appearance. The bottom is an immense stra- 
tum of salt, covered to an inconsiderable depth with water. The saline 
stratum has several orifices in it: down one of these, (sixteen inches in 
circumference,) a plumb line was lowered, and no bottom was found 
with 180 feet of cord. The water, impregnated with salt which rests on 
the solid stratum, is so shallow, that one can traverse the lake in every 
direction, either on foot or horseback. At the end of summer the water 
is also dried up, and the lake is covered with salt as white as snow re- 
cently fallen, and of great purity. 
On the presence of Iodine, Potash, and Magnesia, in the Bath 
Waters. By Mr. Cuartes Curr.—Philosophical Magazine, 
No. LX XXVIII. . 
On the general existence of Iodine in Springs. By A. Hen- 
pERSON, M.D.—lJdid. 
Dr. Daubeny was led, a short time ago, to direct his attention to the che- 
mical constitution of springs, and issued a circular, inviting remarks on 
the subject. Among the first results of his inquiries, was the discovery 
of iodine and bromine in certain mineral waters in Great Britain. We 
ourselves had preceded Dr. Daubeny in these researches in one locality, 
and Mr. Murray, we have since found out, preceded us. Dr. Turner 
also, several years ago, discovered iodine in a spring in the vicinity of. 
Edinburgh, and Mr. Cuff has further corroborated the existence of the 
same substance in the Bath waters. On the Continent, Mr. Balard met 
with this body in the saline marshes of the south of France. Mr. An- 
gelini found it in the saline water of Voghera. Mr. Canta, professor of 
chemistry at Turin, ascertained its presence in the sulphureous waters 
of Castel Novo d’Asti. Mr. Canta also found it in several other springs 
in Piedmont and in Sardinia, all of which he remarked were situated 
in tertiary rocks. Mr. Brongniart is, however, of opinion, that these 
springs issue from the sandstone with saliferous deposits, which is not at 
a great depth below these tertiary formations. Iodine has, in one case, 
been found in the mineral world, in a mine of native silver in Mexice. 
Dr. Henderson states, that by evaporating a great quantity of water, he 
has found traces of iodine not only in warm and saline springs, but also 
in every common spring in which there are traces of the chlorides of 
ealcium and sodium. ; 
