80 Report of the Kew Committee. 



those formerly obtained as discussed by Professor Stokes (' Roy. Soc. 

 Proc.,' vol. 32, p. 170). 



Y. VERIFICATION OF INSTRUMENTS. 



The following magnetic instruments have been purchased on com- 

 mission and their constants determined : 



An Inclinometer for the Tiflis Observatory. 



A pair of Inclinometer Needles for the Colaba Observatory. 



Ditto for the U.S. Navy Department. 



Ditto for the Utrecht Observatory. 



The total number of other instruments compared in the past year 

 was as follows : 



Air-meters 6 



Anemometers 2 



Aneroids 164 



Barometers, Marine 31 



Standard 75 



Station 9 



Compasses 7 



Hydrometers > 543 



Inclinometers 1 



Magnets 3 



Rain Gauges 3 



Sextants 157 



Shades 78 



Sunshine Recorders 3 



Theodolites 3 



Thermometers, Arctic , 1 36 



Avitreous or Immisch's 1591 



Chemical 79 



Clinical 10442 



Deep sea 77 



Meteorological 1074 



,, Mountain 27 



Solar radiation 8 



Standards 73 



Unifilars 1 



Total 14,588 



Duplicate copies of corrections have been supplied in 52 cases. 



The number of instruments rejected on account of excessive 



