384 Report of the Kew Observatory Committee. 



I. Magnetic Observations. 



The Magnetograplis have been in constant operation thrpughout 

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

 in January. 



The ordinates of the various photographic curves representing De- 

 clination, Horizontal Force, and Vertical Force were then found to be 

 as follows : — 



Declinometer : 1 inch = 0° 22'*04. 1 cm. = 0° 8'- 7. 



Bifilar, January 15, 1895, for 1 inch £H = 0*0280 foot grain units. 



„ 1 cm. „ = 0-00051 C.G.S. units. 

 Balance, January 16, 1895, for 1 inch cY— 0*0276 foot grain units. 



„ 1 cm. „ = 0-00050 C.G.S. units. 



With regard to magnetic disturbances no very exceptional move- 

 ments have been registered during the year. Some of the principal 

 variations that were recorded took place on the following days : — 



February 8—9, 15 ; March 13—14 ; April 11—12 ; May 10, 29 ; 

 June 2— 3; September 30; October 12— 14, 28— 29 ; November 9— 

 12; and December 7 — 8. 



The hourly means and diurnal inequality of the magnetic elements 

 for 1895, for the quiet days selected by the Astronomer Royal, will 

 be found in Appendix I. 



The following are the mean results for the entire year : — 



Mean Westerly Declination 17° 16'*8. 



Mean Horizontal Force 0*18278 C.G.S. units. 



Mean Inclination 67°23''8. 



Mean Vertical Force 43901 C.G.S. units. 



Observations of Absolute Declination, Horizontal Intensity, and 

 Inclination have been made weekly as a rule. 



A Richard Thermograph has been placed in the Magnetograph 

 Room in order to compare its readings with the observed readings of 

 the Thermometer under the Vertical Force shade, and also to obtain 

 a continuous record of the temperature of the room throughout the 

 year. 



As in 1894 a Table of recent values of the Magnetic Elements at 

 the Observatories whose publications are received at Kew was con- 

 tributed to the July number of ' Science Progress.' As this seems to 

 meet a recognised want, the Committee have decided to go further in 

 the same direction, and to publish a similar table annually in their 

 Report (see Appendix Ia). In some cases the results are direct 



