Report of the Kew Committee. 



479 



By means of this a number of experiments were made, which afforded 

 satisfactory results, with several Lowne's air-meters kindly lent by Mr. 

 Casella, the maker. . A more complete whirler has now been con- 

 structed, and it is intended to include the examination of these air- 

 meters in the list of operations carried on by the Verification 

 Department. 



The electrical anemograph mentioned in the 1886 Report as having 

 been sent to Valencia for erection on that island, was returned to 

 Kew in a somewhat damaged condition after a lengthened trial in a 

 very exposed situation. Certain defects in its construction which 

 became evident during its stay there have now been corrected, and, 

 after undergoing thorough repair, the instrument has been erected 

 on a suitable staging on the roof of the Observatory, with the 

 intention of submitting it to a rigorous comparison with the Beckley 

 anemograph working at the same level about 14 feet due south of it. 



V. Verification of Instruments. 



The following magnetic instruments have been purchased on com- 

 mission and their constants determined : — 



An inclinometer and unifilar magnetometer for U.S. Navy Depart- 

 ment, Washington. 



An inclinometer for the University of Modena, Italy. 



Three magnets for Mauritius. 



The total number of other instruments compared in the past year 

 was as follows : — 



Air-meters 3 



Anemometers 3 



Aneroids 77 



Artificial horizons 94 



Barometers, Marine 72 



,, Standard 63 



Station 20 



Compasses * 4 



Hydrometers 288 



Inclinometers 4 



Navy Telescopes 99 



,, Binoculars 341 



Rain Gauges , . . 15 



Sextants 292 



,, Shades 42 



Sunshine Recorders 2 



Carried forward 1419 



VOL. XLYI. 2 K 



