Appendix to the Report of the Kew Committee for the 

 Year ending December 31, 1890. 



MAGNETICAL AND METEOROLOGICAL OBSERVATIONS, 



Made at the Kew Observatory, Richmond, Lat. 51 28' 6" 

 N. and Long. O h l m 15 S< 1 W., height 34 feet above mean 

 sea-level, for the year 1890. 



The results given in the following tables are deduced from the 

 magnetograph curves which have been standardised by observations 

 of deflection and vibration. These were made with the Collimator 

 Magnet K.C. 1. and the Declinometer Magnets marked N.E. and 

 K.O. 90 in the 9-inch Unifilar Magnetometer by Jones. 



The Inclination was observed with the Inclinometer by Barrow, 

 No. 33, and needles 1 and 2, which are 3| inches in length. 



The Declination and Force values given in Tables I to VI are pre- 

 pared in accordance with the suggestions made in the fifth report of 

 the Committee of the British Association on comparing and reducing 

 Magnetic Observations. 



The following is a list of the days during the year 1890 which 

 were selected by the Astronomer Royal, as suitable for the deter- 

 mination of the magnetic diurnal variations, and which have been 

 employed in the preparation of the magnetic tables. 



January 5, 7, 12, 30, 31. 



February 2, 7, 10, 23, 25. 



March 2, 3, 9, 29, 30. 



April 3, 9, 18, 25, 28. 



May 1, 13, 16, 22, 29. 



June 6, 10, 15, 24, 30. 



July 3, 9, 14, 28, 29. 



August 4, 12, 13, 28, 30. 



September 8, 9, 23, 27, 28. 



October 4, 7, 21, 28, 29. 



November 3, 6, 11, 24, 29. 



December 3, 7, 12, 14, 26. 



