228 
Analyses of Books. 
A locality is quoted from the Geological Transactions, vol. i. N. S. of gypsum 
found by Lieut, (now Captain) Gerard, in the bed of the Splti, as also of anhydrite, 
and a specimen of the latter (a rolled piece) is mentioned in a note to have been re- 
ceived from the neighbourhood of the snowy peaks. 
Excepting that which occurs as a vein in blue limestone, which is fibrous, the gj'p- 
sum which is the subject of this paper “ is of the variety called foliated granular ; it 
is of a snow white colour, the lustre is equal or a little, superior, perhaps, to that of 
white marble. It is scarcely translucent.” The specific gravity is about 2, 24, the 
hardness 2,0. 
With regard to its geological position and relations, it is found in superficial 
masses, which can hardly be called either beds or veins, apparently independent and 
limited in extent. It frequently contains fragments of the associated rock, occa- 
sionally it is associated with a clay slate, the crevices of which when opening on the 
surface had been filled up by the mineral, apparently from infiltration. More com- 
monly the rock is of an anomalous character. It lias all the aspect of a limestone, 
but refuses to effervesce with acids, or at least does so very' feebly. It is frequently of 
a deep black colour, and has a fetid odour, particularly when struck or fractured. 
The odour is that of sulphuretted hydrogen. As it passes into well characterised 
limestone, it must, be considered geologically as one of the numerous types of that 
rock, though, as it is so highly charged with argillaceous and probably siliceous 
matter, its claim to the title of a limestone, would not be so obvious in a hand spe- 
cimen. These rocks the author of the paper inclines to consider as belongingto 
the transition class, hut the gypsum he believes to he of comparatively modern 
formation, and similar in its origin to those masses of stalagmitic limestone which 
are found in every rock, from the oldest gneiss to the newest floetz rocks." This 
opinion he founds “ on its limited extent, its being associated with a sulphuretted 
limestone, and lastly from its containing fragments of the neighbouring rock." 
From the particulars given in a paper of A'l. Broohant's on the gypsum of the Alps, 
which is noticed in a postscript, it is thought additional confirmation is given to this 
opinion. 
XIV On the Fertilizing Principle of the Inundations of the Hugli. Bv H. Pid- 
dington, Esq. pp. 224 to 226. 6 J 
This is an extremely interesting, and, we will add, valuable paper. We shall re- 
serve it for repubhcation. 
XV. On the Mineral Productions of that part of the Himmalaya Mountains /./,W be- 
tween the Satlvj and the Kali ( G&gtah ) Rivers, considered in an economical point 
of mew : including an Account of the Mines and Methods of working them, with 
Suggestions for their Improvement. By Captain J. D. Herbert, 'Jth Rea. B. N. I. 
late Sup. Min. Survey, and Resistant to the Surveyor General of India pp 227 to 
The minerals found in these mountains may he divided into those which do not, 
anc those which do yield metal. The non-nietallic minerals are as yet unproduc- 
live, and, with the exception of bitumen, are not articles of commerce. They are as 
follows : J 
1. Sulphur; 2. Green sulphate of iron; 3. Alum; 4. Bitumen; 5. Graphite; 
C. Gypsum; /.Limestone; and 8. Potstone, or indurated talc. To these of rocks, 
have been added granite and porphyry, and subjoined, are given a few particulars 
on Borax, a mineral brought from the adjoining country of Thibet. 
Sulphur is found in the deposites of hoc springs mechanically mixed with carbonate 
f n C ’»/ nd 1,6 S all «iies of lead mines. In the former state it occurs in the bed 
TV,n, 1 ?n R r'‘ mg T"/' !lnd Ga ?i a rive ” ,n Kamdun, and in the latter at Mvwar, on the 
dor 1, iwfnr ' ns Y Green su Iphate of iron is found in connection with the first noticed 
deposites of sulphur. It might be obtained in any quantity from the ironpvritesof 
bed rXthXcXilM I 11 XT' “““.efflorescence on micaceous schiJt in the 
men exudes fro n ’r ’ f lm6r « h i and tt * supposed, in many other places. Bitu- 
n l' a limestone on the road between the cantonments of Almdrah, 
Xe d snrfaceofaWM h Y a * fou ? d - ln round and kidney shaped masses lying on 
mfr d ' 2 2 £ a, burCUed " *> s schist. The specific gravity w«; deter- 
mined at 2,21 to -.20. It was not of the best or finest quality, though far from bad; 
Wsvwunu the Xwil'Y'’ "'i'" 1 ' tha *'. U . mil >' 1 b . c >' l>t , ' oun < 1 m considerable quantity. 
Ynrt worthy of ,e T ant , lf 'f te a Previous paper. The limestones 
marble. 3 Another a flesh coloured dolomite, with purple clouded delineations. These 
