40 ~ REPORT—1858. 
5. Delta of the Indus, 
6. The Vindhya Mountains, 
7. Delta of the Ganges, 
8. East Coast Bay of Bengal, 
9. Eastern Ghauts; 
and under these divisions describes more or less fully a total number of 
162 earthquakes, which he finally tabulates, by date and place only. The 
epoch of his catalogue commences nominally at a.p. 1505; but almost the 
whole of the catalogue refers to the 19th century, and comes down to the 
year 1842. 
After his remarks upon the earthquakes of the first region (p. 1039), he 
observes, “The hot springs, I believe, owe their high temperature to in- 
ternal chemical action extensively distributed ; and the earthquakes are due 
to the convulsive efforts of the elastic matter generated by this action in 
escaping from the interior of the earth.” .. . “To define the nature of this 
action, while ignorant of the chemical nature of the springs, would be in 
vain;”....but.... “I cannot resist the conviction that both are due to 
one and the same origin.” .... “ There are no active volcanic vents yet dis- 
covered in the Himalayas, but abundant hot springs and trap dykes, and 
evidences of disruptive action.” 
In the same vol. p. 741, a translation, by A. Sprenger, of the Arabic 
MS. in the Imperial Library at Paris, of a work of As. Soyuti on earth- 
quakes, is given. The original work is entitled, ‘Kashf as salsalah’an 
wass az Zalzalah,’ z.e. “a clearing up of the history of earthquakes.” It 
contains a catalogue of about 120 earthquakes in Western India, Persia, 
and Caubul, and extending to Arabia, Syria, and Egypt. It certainly, how- 
ever, scarcely warrants its title, and contains few facts of scientific value. 
Again (p. 907), a small catalogue of earthquakes in Upper Assam occurs 
—the authors, Capt. Hannay and Rev. N. Brown. The chief statement 
of importance to be found in it is their opinion, that in this region the hori- 
zontal direction of shock seems to be mainly from S.W. to N.E. 
Since the publication of former ‘ Reports,’ some monographs of single 
earthquakes have appeared ; but reference is here only to catalogues. 
While these sheets have been passing through the press, the work of Dr. 
Otto Wolger, with catalogues of the Swiss earthquakes, has appeared, and 
demands notice for the extreme accuracy and care with which the volumes 
have been produced,—‘ Untersuchungen iiber das Phanomen der Erdbeben 
in der Schwitz,’ von Dr. G. H. Otto Wolger, Gotha 1857, 1858, 3 vols. 8vo. 
The first, “‘ Chronic der Erdbeben in der Schwitz,” also embraces a discussion 
as to the periodicity, locality, and extent (Ausdehnung) of the Swiss earth- 
quakes, with the results graphically reproduced. 
The second contains the geology of the Canton of Wallis, in which so 
great a number of rapidly recurrent feeble shocks have been so long recorded. 
The third, ‘Geschichte der Erdbeben (im Wallis) des meteorologischen 
Jahres 1855,’ together with a chronicle of those in the Swiss Cantons and 
adjacent parts of France. 
There is an excellent though small map of the Canton of Wallis, showing 
the points of observation of the many small sbocks that have become identi- 
fied with the name of Pignerol as a centre—and in several instances showing 
the horizontal directions observed—which quite bear out the observations to 
be found further on, as to the effects of surface in perturbing the general 
emergent direction of the wave of shock. 
The work of Dr. Wolger is entitled to the study of physical geologists. 
