84 REPORTS ON THE STATE OF SCIENCE. 
2 inches wide, was sent to F. Bareda Y. Asma, Esq., Lima, Peru. This 
was for the use of the Geographical Society. This year a two-component 
instrument, recording on a cylinder moving at the rate of 25 cm. per 
hour, was forwarded to W. G. Davis, Esq., Director of the Meteorological 
Department, Buenos Ayres. Its number is 49. Two instruments are 
being constructed for the Public Works Department, Cairo. The intention 
is to instal one of them at Khartoum and the other near the Victoria 
Nyanza. We understand that an instrument has been ordered for the 
Government of South Australia. 
Mr. Richard Cooke, The Croft, Detling, Maidstone, has again kindly 
sent 1/. 1s. for the support of seismological research. 
At a Committee meeting held on February 21, Professor J. W. Judd 
expressed a strong wish to retire from the office of chairman, which office 
he had held for nine years. The announcement was naturally received 
with regret, and a vote of thanks was accorded to Professor Judd for his 
valuable services. Professor H. H. Turner has kindly consented to take 
over the vacant position. 
The office accommodation at Shide has been increased, and has been 
seen by the President and several members of your Committee. Mr. 
H. C. O'Neill joined me as an assistant on March 11, since which time he 
has been daily attending to the instruments and the regular routine work. 
T also receive assistance from Messrs. 8. Hirota and J. H. Burgess, who, 
as you are aware, have worked at this observatory since its establishment. 
Correspondence, which is frequently of a descriptive nature and 
requires photographic and other illustrations, has naturally increased with 
the growth in number of stations and the increasing interest in earth- 
quake phenomena. Material has been supplied to the Committee con- 
nected with the Carnegie Institute investigating the San Francisco 
earthquake, to the Central Bureau of the International Seismological 
Association, and to many others. 
II. The Situations of Stations. 
Continued from ‘ British Association Reports,’ 1905, p. 84, and 1906, p. 93. 
Pilar, Argentina. 
On January 20, 1905, the seismograph was dismounted in Cordoba and removed 
to Pilar, our new magnetic station, lat. 31° 40’ and 4h. 15-4m. W. of Greenwich. 
A special building was erected for the seismograph and Mascart’s electrometer. 
The building is of brick, with cemented floors and ventilation coming through the 
floor and passing through the roof, with two windows on opposite sides of the 
building. The pier on which the seismograph rests is built of masonry, with its 
foundations extending to a depth of 15 metre below the floor. ‘The ground is 
compact alluvial deposit. The building is situated about 100 metres from the 
Rio Segundo, that is, the river Segundo. In summer there is frequently a large 
volume of water, but in winter the river is practically dry. 
The instrument was installed on February 1, 1905, but the masonry was not 
considered sufficiently settled to allow of trustworthy registers from the instrument 
till the end of the month, so that the records of 1905 begin on March 1. The 
photographic record, however, shows no well-defined movement during the month 
of February. The period of the boom oscillations was kept constant from the 
month of February till June 22, at 17 seconds, the same as formerly used in 
Cordoba, giving a sensibility of 0'56. On November 2 this was increased to 16 
seconds, with a sensibility of 0''50 to one millimetre of displacement of the outer 
end of the boom. 
W. G. DAvis, Director. 
