REPORTS ON THE STATE OF SCIENCE, 
Bre. 
SEISMOLOGICAL INVESTIGATIONS. 
Fortieth Report of Committee (Dr. F. J. W. Wu1ppLe, Chairman ; Mr. J. J. 
SHaw, C.B.E., Secretary ; Miss E. F. Bettamy, M.A., Prof. P. G. H. 
BosweELL, O.B.E., F.R.S., Sir CHarLes Boys, F.R.S., Sir F. W. 
Dyson, K.B.E., F.R.S., Dr. WiLFreD Hatt, Mr. J. S. HuGues, 
Dr. H. Jerrreys, F.R.S., Mr. A. W. Lee, Prof. E. A. MILne, M.B.E., 
F.R.S., Mr. R. D. OLDHaM, F.R.S., Prof. H. H. PLaskett, Prof. H.C. 
PLummer, F.R.S., Prof. A. O. RANKINE, O.B.E., F.R.S., Rev. J. P. 
Row .anp, S.J., Mr. D. H. Sapier, Prof. R. A. Sampson, F.R.S., 
Mr. F. J. Scrase, Dr. H. SHAw, Sir FRANK Smitu, K.C.B., C.B.E., 
Sec.R.S., Dr. R. STONELEY, F.R.S., Mr. E. TiLtLotson, Sir G. T. 
Wa ker, C.S.I., F.R.S.). 
Personal—The deaths of two members of the Committee are recorded 
with deep regret. ‘These were Sir H. Lamb and Prof. H. M. Macdonald, 
both distinguished for their work in applied mathematics; both had 
served on the Committee since 1915. Reference must also be made to the 
deaths of two former members. Sir Alfred Ewing was one of the group 
of British scientists who helped to develop the beginnings of instrumental 
seismology in Japan. As early as 1881 he devised the method, sub- 
sequently adopted by Galitzin, of obtaining a long free period for the 
vertical seismograph, by attaching the spring BELOW the axis of the lever. 
_ He was naturally one of the first members of the Committee formed when 
ae and Milne joined forces in 1895. He served until 1909. Sir 
Arthur Schuster, who was a member of the Committee from 1910 to 1931, 
’ 
Btook great interest in the organisation of international co-operation. It 
-may be recalled that he was chairman of the Committee, appointed in 
1904 by the International Association of Academies, to consider the 
advisability of co-operation in seismological investigations. This Com- 
“mittee recommended?! that the Associated Academies should take action 
with their respective governments in favour of joining the International 
Seismological Association, founded at Strasbourg in 1903. Schuster be- 
came an active member of the Permanent Commission of this Association, 
_and presided over the meetings held at Zermatt in 1909, and at Manchester 
‘inigi1. To throw light on the question whether microseismic disturbance 
was related to sea waves, Schuster had apparatus made for counting and 
‘so finding the average period of the waves.2 This apparatus was set up 
at the lighthouse at South Shields, and was maintained in operation by 
Mr. H. Morris-Airey. It appears, however, that no detailed comparison 
With seismographic records was ever carried out. The set of Galitzin 
1 Cf. B.A. Report, 1905, p. 92. 
2 Assn. Int. de Sismologie, C.R., 1911, p. 69. 
