446 



Report of the Keiv Committee. 



Information on matters relating to terrestrial magnetism and various 

 data have been supplied to the Hydrographic Office, Dr. E. Van 

 Ryckevorsel, Dr. Atkinson, Dr. Thorpe, Mr. Elliott, Mr. Fleming, and 

 Mr. Gordon. 



To the last-named gentleman the Committee also lent illustrations 

 of the magnetographs and other magnetic instruments employed at 

 Kew for use in a work he has in preparation upon Electricity and 

 Magnetism. 



The following is a summary of the number of magnetic observations 

 made during the year: — 



Determinations of Horizontal Intensity 29 



Dip 123 



,, Absolute Declination 25 



Meteorological Work. — The several self-recording instruments for 

 the continuous registration respectively of atmospheric pressure, tem- 

 perature, humidity, wind (direction and velocity), and rain have been 

 maintained in regular operation under the care of Mr. T. W. Baker, 

 assisted by Mr. J. Hillier. 



The standard thermometer (No. 379) for eye observations of the 

 temperature of evaporation was accidentally broken in September 

 whilst re-covering the thermograph tube with new muslin. A spare 

 thermometer (No. 473) of the same construction was at once set up in 

 its place, so that no loss took place in the registrations. 



The standard eye observations made five times daily, for the control 

 of the automatic records, have been duly registered through the year, 

 together with the daily observations at Oh. 45m. p.m. in connexion 

 with the Washington synchronous system. 



An additional daily observation has been made since July 1st at 

 6 h. 45 m. p.m., to be used in a second synchronous system organised 

 by M. Mascart, Directeur du Bureau Central Meteorologique, Paris. 



The tabulation of the meteorological traces has been regularly 

 carried on by Mr. Hawkesworth, and copies of these, as well as of the 

 eye observations, with notes of weather and cloud, have been trans- 

 mitted weekly to the Meteorological Office. 



The following is a summary of the number of meteorological obser- 

 vations made during the past year : — - 



Headings of standard barometer 2270 



,, dry and wet thermometers 5818 



,, maximum and minimum thermo- 

 meters 976 



,, radiation thermometers 1670 



,, rain and evaporation gauges 830 



Cloud and weather observations 2607 



