Report of the Kew Committee. 



157 



account of the year's work, was forwarded to the Meteorological 

 Council in November last. 



Particulars, with specimens of cloud pictures, were also supplied to 

 Mr. Rotch, of the Blue Hill Observatory, for communication to 

 the Committee of the International Meteorological Conference at 

 Munich. 



Experiments were also made with several new lenses kindly lent 

 by Mr. Dalhneyer, in order to select one suitable for giving pictures 

 covering a wider field of view than the R.R. lens hitherto employed, 

 which confines the observer to clouds within 15° of the zenith. 



The results of these experiments, as well as others with Eastmann 

 films used instead of glass plates, have been communicated to the 

 Meteorological Council. 



In compliance with the request forwarded by Mr. Clayden, secretary 

 to the British Association Committee on Meteorological Photography, 

 for copies of photographs illustrating meteorological phenomena, or 

 their effects, the Committee forwarded a selection of duplicate cloud 

 and other photographs to be added to the collection which has been 

 formed. 



V. Verification of Instruments. 



The following instruments have been purchased on commission and 

 their constants determined : — 



1 Unifilar magnetometer for the Royal Observatory, Greenwich. 



1 Ditto, ditto for the Vatican Observatory, Rome. 



1 Ditto, ditto for the Meteorological Department, Brazil. 



1 Inclinometer, ditto, ditto. 



1 Ditto has been repaired for the Hague. 



1 Electrical anemometer for the Observatory, Mauritius. 



1 Marine chronometer for the Colaba Observatory, Bombay. 



1 Richard aneroid, and set of thermometers, for the Richmond 



Terrace Gardens Committee. 

 1 Telescope. 



1 Set of magnetograph needles for Mauritius Observatory. 

 1 Ditto dip needles and bar magnets for the Hague. 



The total number of other instruments compared between November 

 1, 1890, and December 31, 1891, was as follows : — 



Air-meters 7 



Anemometers 19 



Aneroids 72 



Artificial horizons 10 



Carried forward 108 



