NOTICES OF BOOKS. 103 
country has been considerably elevated since the formation of 
these alluvial beds; and I can find no cause for the closing of the 
lake, save unequal elevation. Altogether, the locality was most 
interesting to me, and it well deserves the scrutiny of a good 
geologist. As. to the sulphur, that place, too, was eminently 
curious; and I procured beautiful specimens of crystals of 
sulphur, and of various salts, whose characters and composition 
yet remain to be determined. 
Respecting our future movements, I can tell you no more than 
that our course lies down the Indus. We shall remain about a 
week at Leh (or Ladakh) and I shall write to you, either thence, 
or soon after leaving that place. 
There are several Poplar trees and much cultivated ground 
here.* 
T. THomson. 
NOTICES OF BOOKS. 
Prest, BoraniscHe BEMERKUNGEN; separately published from 
the Transactions of the Royal Bohemian Society of Sciences. 
Prague. 1844. 
Tuis isa 4to pamphlet of 154 pages, professing to contain 
observations on, and especially corrections of, the determinations —— 
of plants contained in various collections generally distributed by — 
sale or otherwise, determinations of species hitherto only desig- —— 
nated by numbers, and characters of a considerable number of —— 
new genera and species; the collections reviewed being chiefly the | 
South African ones of Drége, and of Ecklon and Zeyher, Sieber's — 
various collections, and those distributed by the deni Lo 
Unio Itineraria, with a few species of Cuming, Lhotsky, and —— 
others. From the hands of a botanist of reputation, who has 
access to a very fair botanical library and no inconsiderable herba- | 
rium, (chiefly presented to the Prague Museum by the late distin- ; 
* Since the above was sent to press, we have received another highly interesting | 
letter from Dr. Thomson, deseribng the ronte to Teh and thenee to “ Nabra Valley,” 
O . me uo Pu 
