70 REPORTS ON THE STATE OF SCIENCE.—1912. 
whether a given earthquake was noted at only one or at several stations. 
In the former case the original entry is rejected, and these uncorrobo- 
rated entries are frequently so numerous that registers have to be re- 
copied before they are passed on to the press. All entries in the cir- 
culars, therefore, refer to disturbances which have affected large areas. 
If this course were not pursued the list of local earthquakes for many 
districts would contain possibly one thousand or more entries per year. 
Another reason for not publishing local disturbances is that a catalogue 
of this description is prepared by the International Seismological 
Association. 
Visitors.—The largest party of visitors to the Observatory at Shide 
was some seventy members of the British Association. Among others 
who came for instruction or to obtain special information were the 
following: Dr. E. Naumann, from Frankfurt; Dr. F. Omori; Major 
A. J. Peile, R.A.; R. C. Franck, University of Paris; Maxwell Hall, 
from Jamaica; Professor J. Perry; W. E. Plummer; Professor J. W. 
Gregory; J. J. Shaw; E. T. Cottingham, who kindly put our regulator 
in order; Hon. H. Lockward, from Bermuda; Sir William Crookes ; 
Mrs. L. H. Hoover; M. H. Gray; J. Woodrow, Jun.; Rev. F. E. 
Pigot, S.J.; Professor H. H. Turner; Professor T. Swain. 
Stations.—Paisley: At the Coats Observatory arrangements are 
being made for the installation of a twin-boom seismograph. 
A new station is to be established at Accra on the Gold Coast. 
Records are now being received from the Seychelles and Cocos, 
and shortly it is expected that records will be received from Fiji. 
Situation of Stations. 
Zikawet.—This station is on a plain of alluvium as flat as the sea, 
extending in certain directions 30 km. and in other directions more than 
100 km. The alluvium is said to be about 100 metres deep. Two 
Omori pendulums are fixed each on a block of concrete (0°80x1:00 
x 180 metres). A Wiechert astatic seismometer of 1,000 kilo- 
grammes is on a similar block (1:00145x1°65 metres). Water is 
found in the ground at a depth of 1°5 to 2 metres. The building (which 
is the old magnetic room) is composed of two concentric rooms to avoid 
effects due to rapid variations of temperature. It is 10 kilometres 
distant from Shanghai and far away from a public road. The terminus 
of the tramways on the Zikawei road is about 800 metres distant. 
Agincourt.—This station is nine miles from Toronto. It is on 
alluvial soil of very considerable depth. The underlying rocks at 
Toronto and Agincourt are the same (Hudson River Shale). The drift 
deposits no doubt are different to some degree, but there are no sections 
from Agincourt to compare with those at Toronto. 
IT. Seismic Activity, 1904 to 1909 inclusive. 
The following catalogue is continuous with the one in the British 
Association Report for 1911, p. 57. The earthquakes to which it refers 
have been recorded at stations all over the world, or at stations repre- 
