94 
POPULAR SCIENCE REVIEW. 
read a paper on the above before the Edinburgh Geological Society on 
November 17. He pointed out the resemblances which he thought might 
be laid down between the above and the silurians of the North of England. 
He drew attention to the fact that the Wrae limestone of Peeblesshire might 
very possibly be the equivalent of the Bala limestone of Wales, and the 
Coniston limestone of Cumberland and Westmoreland ; and that this would 
considerably simplify the elucidation of the Scotch silurians. He showed, 
however, that much work must yet be done before it would be possible to 
speak with any certainty as to the correlation of these ancient deposits. 
Ancient Eai'tliqvakes . — In the 11 Geological Magazine” for December, Mr. 
J. Prestwich, the President of the Geological Society of London, gives a 
curious record of the above, collected from the writings of his relatives. 
According to this record, the earthquakes were distributed as under by 
centuries i 
md seasons. 
January . 
. 2. 
11th Century, 
6. 
February . 
. 3. 
12 th 
» 
16. 
March . . 
. 2. 
13th 
V 
6. 
April . . 
. 4. 
Winter months , 
, 11. 
14th 
i) 
3. 
May . ► 
. 5. 
15th 
)) 
1. 
June . • 
. 0. 
Spring . . . , 
, 11. 
16th 
V 
5. 
July . . 
. 3. 
17th 
» 
9_ 
August . 
. 4. 
Summer . . . 
, 7. 
18th 
13. 
September 
. 6. 
— 
October . 
. 1. 
Autumn . * . 
8. 
Total 
, . 
59. 
November 
. 1. 
7 
December 
. 6. 
This shows a great prevalence of earthquakes in the 12th century, a 
gradual decrease m numbers to the 15th, and then a gradual increase to the 
18th century. They seem also to have been more numerous in winter and 
spring than in summer and autumn. The months, however, in many cases 
are not recorded, and no doubt the general record is confined to the more 
important and noticeable catastrophes. 
Mediterranean Geology. — Mr. G. Man, in the last number of the u Geolo- 
gical Magazine ” under the title of 11 Notes on the Mediterranean,” gives a 
great deal of interesting information. Among other points he refers to the 
well known Temple of Serapis. This, he says, giving evidence of sub- 
mergence and re-elevation within known heights and certain limitations of 
historic time, suggests a comparison with other evidences of similar eleva- 
tion ; and he would remark that Lyell’s estimate of the amount of emer- 
gence of the shell-bored columns on the Italian coast agrees almost exactly 
with the amount of elevation in other distant parts, implied by the raised 
gravel ridge on the Corsican marshes, the great plain of shingle at the 
Phone delta, and the lagoons of the south-western Mediterranean French 
coast. Furthermore, Mr. Gwyn Jeffreys informs him that a recent marine 
deposit, containing Galeomma Turtoni and other shells of species now 
living in the adjacent parts of the Mediterranean, occurs at Antibes at a 
similar height, viz. 25 feet, above the sea-level; and Mr. James Smith 
attributes the sandy plain immediately to the north of Gibraltar to a 
period of stationary level with a littoral zone exactly 24 feet above the 
