406 



Report of the Kew Committee. 



ratus recently returned by Professor Peirce from the United States, 

 and swing the pendulums so as to obtain a differential connexion with 

 recent swings in New York. Subsequently, it is intended to convey 

 the whole to the Royal Observatory at Greenwich, where other series 

 of observations and experiments will be conducted with a view to 

 connecting Greenwich with Kew. 



At the request of the Meteorological Council, various experiments 

 were tried with the view of selecting a suitable paper for use with the 

 Beckley anemographs, and also of remedying certain defects found 

 attendant on the employment of gelatinised photographic curves in 

 processes of mechanical reduction in the Meteorological Office. 



Y. Verification of Instruments. 



The following magnetic instruments have been verified, and their 

 constants determined : — 



1 Unifilar Magnetometer and an Inclinometer for the Falmouth 

 Observatory. 



Two Inclinometers have been purchased on commission for the 

 Bureau of Navigation, Washington, 1 each also for the Ekaterinburg 

 Observatory and the Lighthouse Board, Helsingfors. 2 Dip Needles 

 have been procured and tested for the Mauritius Observatory ; also 

 1 pair for the Lisbon Observatory ; 7 Thomson's patent compasses 

 with 7 vertical force instruments have also been examined for the 

 Imperial Japanese Navy. 



1 Unifilar, 2 Compasses, and 2 Inclinometers have been tested for 

 opticians, and 2 Unifilars are at present undergoing verification. 



The total number of other instruments compared in the past year 

 was as follows : — 



Barometers, Standard 31 



,, Marine and Station 92 



Aneroids 124 



Total 247 



Thermometers, ordinary Meteorological 1320 



,, Standard and Chemical 210 



,, Mountain 45 



Clinical 9054 



„ Avitreous 816 



Solar radiation 45 



Total 11490 



