SEISMOLOGICAL INVESTIGATIONS 267 
The International Seismological Summary.—During the latter half of 1932 
there were two issues of the Summary. ‘These completed the volume for 
- the earthquakes of 1928. The issues containing the Summary for the first 
two quarters of 1929 have been printed. Prof. Plaskett reports that the 
MS. for the rest of that year is nearly ready for the printer. As far as the 
records for 1930 have been received, they have been copied on to cards in 
readiness for analysis. It is proposed to take into use at once such new 
tables as may be adopted at the meeting of the International Seismological 
Association at Lisbon. 
Seismographs. —The five seismographs belonging to the British Associa- 
tion have remained on loan to the Seismological Stations at Oxford (2), 
Edinburgh, Perth (W. Australia) and Cape Town. 
Interesting memorials of the earliest seismological station in England 
have been obtained recently by the Science Museum, South Kensington. 
Early in 1932 Miss Morey of Newport, Isle of Wight, presented to the 
Museum the original lamp-post on which Milne erected his first seismograph 
at Shide. The drum and recording mechanism of this seismograph, which 
were in the possession of Mr. W. H. Bullock, have been purchased and an 
effort is to be made to reconstruct the apparatus as accurately as possible. 
A good many parts of old instruments from Milne’s workshop are now 
at the University Observatory, Oxford, but it appears that there is nothing 
of definite historical interest, and with the approval of this Committee 
Prof. Plaskett will dispose of the material at his discretion. Some of the 
parts found in this collection have been lent to the Rev. H. Pain of Turville 
Vicarage, Henley-on-Thames, who has constructed a seismograph and 
obtained good results. 
During the year the Milne-Shaw seismographs supplied by Mr. Shaw 
to the Department of Geology, Liverpool University, and to the Depart- 
ment of Geology, University of Vermont, have been brought into operation. 
British Earthquakes——A valuable paper dealing with the macroseismic 
evidence of four recent Scottish earthquakes has been published by Dr. 
G. W. Tyrrell in the Transactions of the Geological Society of Glasgow, 
Vol. xix, Part I, 1931-32. The shocks examined are: 
(1) The Oban earthquake of 1925, December, 23 12%. 
(2) The North Sea earthquake of 1927, January, 24° 5". 
(3) The Collentraive earthquake of 1927, January, 274 92. 
(4) The Lochgilphead earthquake of 1927, January, 27% 162. 
On January 14, 1933, at about 8530™ an earthquake was felt over a large 
area in the North of England ; and a slight after-shock, felt at 16h. 3m. on 
the 17th, was recorded at Stonyhurst. A report on this earthquake has 
been prepared by the Rev. J. P. Rowland. An earthquake which was felt 
in Jersey on April 12 was recorded by seismographs in England. 
Small disturbances not recorded by seismographs were reported by 
newspapers as occurring on the following dates : 1932, December 31, Devon; 
1933, April 23, Canterbury. A weak tremor, reported as being felt at 
Great Harwood, Lancs., on 1933, July 7, was reported at Stonyhurst 
at 12h. 1m. 
The Revision of Seismological Tables —The following note has been 
contributed by Dr. H. Jeffreys and Mr. K. E. Bullen: 
The observations recorded in the I.S.S. from 1923 to 1929 are being 
used to construct revised tables for the principal waves recorded in large 
earthquakes. The method used is equivalent to a least-square solution by 
successive approximation. The numbers of earthquakes used in the 
respective regions are: Europe, with the Mediterranean and Central 
