Report of the Kew Observatory Committee for the Year 

 ending December 31, 1899. 



The operations of the Kew Observatory, in the Old Deer Park, 

 Eichmond, Surrey, are controlled by the Kew Observatory Committee, 

 which is constituted as follows : — 



Mr. F. Galton, Chairman. 



Captain Sir W. de W. Abney, 



K.C.B., KE. 

 Prof. W. G. Adams. 

 Captain E. W. Creak, R.N. 

 Prof. G. C. Foster. 

 Prof. J. Perry. 

 The Earl of Rosse, K.P. 



Prof. A. ^Y. Riicker. 

 Dr. R. H. Scott. 

 Mr. W. N. Shaw. 

 Lieut.-General Sir R. Strachey, 

 G.C.S.L 



Rear Admiral Sir W. J. L. mar- 

 ton, K.C.B. 



The work at the Observatory may be considered under the follow- 

 ing heads : — 



I. Magnetic observations. 

 II. Meteorological observations. 



III. Seismological observations. 



IV. Experiments and Researches in connexion with any of the 



departments. 

 V. Verification of instruments. 

 VI. Rating of Watches and Marine Chronometers. 

 VII . Miscellaneous. 



I. Magnetic Observations. 



The Magnetographs have been in constant operation throughout 

 the year, and the usual determinations of the Scale Values were made 

 in January. 



The ordinates of the various photographic curves representing 

 Declination, Horizontal Force, and Vertical Force were then foimd 

 to be as follows : — 



Declinometer : 1 cm. = 0° 8' '7. 



Bifilar, January, 1899, for 1 cm. 8H = 0-00051 C.G.S. imit. 

 Balance, January, 1899, for 1 cm. 5V = 0-00052 C.G.S. imit. 



