250 REPORTS ON THE STATE OF SCIENCE, ETC. 



Seismographs. — The six seismographs belonging to the British Association 

 have remained on loan to the seismological stations at Oxford (2), Edinburgh, 

 Perth (W. Australia) and Cape Town (2). 



A happy sequel to the efforts of the Committee to further the establish- 

 ment of a seismological station at St. Louis Observatory in Jersey is to be 

 reported. M. E. Rothe, Director of the Institut de Physique du Globe 

 at Strasbourg, has been so good as to lend a Mainka seismograph to St. 

 Louis. The station, which is being maintained by the Rev. C. Rey, S.J., 

 should prove of great value in studies of the minor earthquakes which are 

 not uncommon in the neighbourhood of the Channel Islands. The nearest 

 existing seismograph stations are Kew and Oxford, about 300 km. away, and 

 Paris, about 330. 



At Kew Observatory a second Wood-Anderson seismograph has been 

 taken into use. It may be noted that the two Wood-Anderson seismographs, 

 which record on one drum, were run for a time with a period of about 1 sec. 

 It was found, however, that no significant records were obtained and the 

 instruments were then adjusted to the period of 2 ■ 3 sec, enabling distant 

 earthquakes to be recorded clearly. A new seismograph house has been 

 constructed at Kew. It is hoped that the effects of wind which have 

 marred the records of the Galitzin seismographs in the basement of the 

 Observatory will be avoided. 



Mr. Shaw reports that the Milne-Shaw seismograph on order for Brisbane 

 has been delivered. A second component has been supplied to Helwan, 

 Cairo. This instrument was equipped with a recording mechanism giving 

 15 mm. traverse of the film per minute. A duplicate recording unit has 

 been sent to Colaba, Bombay, and a timing clock (second regulator) is being 

 constructed for use with the seismograph at the Upper Air Observatory, 

 Agra, Bombay. Mr. Shaw is also constructing a Milne-Shaw seismograph 

 for the Exhibition of Instruments at the forthcoming meeting of the Union 

 of Geodesy and Geophysics at Edinburgh. 



British Earthquakes. — There was no considerable earthquake in the British 

 Isles during the year, but small disturbances were reported as occurring 

 on the following dates : 



Dr. Dollar has undertaken to collect observations of any earthquakes 

 which may occur in the British Isles in future. Dr. Dollar is also hoping 

 to publish the collected records of the earthquakes which have occurred in 

 these islands since the Hereford earthquake of January 1924, the last 

 earthquake which finds a place in Dr. Davison's History of British 

 Earthquakes. 



