402 



Report of the Kew Committee. 



Determinations of Horizontal Intensity 30 



Inclination 155 



„ Absolute Declination 36 



The diurnal range of the Declination having become a somewhat 

 interesting feature in magnetic reductions, an additional table, giving 

 the values for the summer and winter seasons and for the whole year, 

 as determined from selected curves by the graphic method,* has 

 been inserted in the Appendix. 



II. Meteorological Observations. 



The several self-recording instruments for the continuous registra- 

 tion respectively of atmospheric pressure, temperature, and humidity, 

 wind (direction and velocity), bright sunshine, and rain, have been 

 maintained in regular operation throughout the year. 



The only alterations made in the above instruments have been the 

 following : a screen of blue glass has been interposed in the baro- 

 graph between the barometer tube and the light, with the result of 

 improving the definition of the photographic curve, and a Stonyhurst 

 lifter has been fitted to the Beckley rain-gauge, causing the pencil to 

 return, to its original position after depression more rapidly than 

 it did previously. 



The standard eye observations for the control of the automatic 

 records have been duly registered during the year, together with the 

 daily observations in connexion with the U.S. Signal Service 

 synchronous system. A summary of these observations is given in 

 Appendix II. 



The tabulation of the meteorological traces has been regularly 

 carried on, and copies of these, as well as of the eye observations, 

 with notes of weather, cloud, and sunshine have been transmitted 

 to the Meteorological Office. 



The terrestrial radiation thermometer (grass minimum) was found 

 broken on July 11, and replaced by a new instrument on July 21. 



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



vations made during the past year : — 



Readings of standard barometer 1725 



,, dry and wet thermometers 3450 



,, maximum and minimum thermo- 

 meters 730 



,, radiation thermometers 1480 



,, rain gauges 730 



Cloud and weather observations 1877 



Measurements of barograph curves 8751 



* See paper by Mr. Whipple in the ' Quart. Jour. Eoy. Met. Soc.,' vol. 9, p. 45. 



