376 



Report of the Kew Committee. 



Electrical Machine used by Ronalds. 

 Eonalds's Eain-and -Vapour Grauge. 

 Eight-haired Saussure's Hydrometer. 

 Thomson's divided-ring Electrometer and Gauge. 

 St.-Helena Magnetometers, comprising the instruments for 



Declination, 



Bifilar, 



Vertical Force. 

 Declination-Compass used by Sir J. Eichardson, 

 Vibration- Apparatus used by Caj^tain Barnett. 

 Dip-Circle used by Sir J. C. Eoss. 

 Apparatus for swinging Pendulums. 

 Invariable Pendulum in Vacuum Chamber. 



Air-Pump, Stand for Vacuum Chamber, and Telescope with stand. 



Gassiot's Eigid Spectroscope and Lamp, 



Quadrant by Butterfield, of Paris. 



Kew Pattern Dip-Circle. 



Portable Unifilar Magnetometer. 



Hodgkinson's Actinometer. 



Model of Mr. Galton's Sextant-testing Apparatus. 



Model of Mr. Cooke's „ „ 



Two engravings of Kew pattern Magnetographs, in frame. 



The Societe Francaise de Photographie having made application to the 

 Committee for assistance in their exhibition of objects illustrating the 

 adaptation of photography to scientific purposes, a set of curves, mag- 

 netical and meteorological, together with a few prints from the solar 

 negatives, were forwarded to Paris, where they were exhibited in the 

 Palais de I'lndustrie. 



Worhsliop. — The several pieces of Mechanical Apparatus, such as the 

 Whitworth Lathe and the Planing Machine, procured by Grants from 

 either the Grovernment-Grant Pund or the Donation-Pund, for the use 

 of the Kew Observatory, have been kept in thorough order ; and many 

 of them are in constant, and others in occasional use at the Observatory. 



Library. — During the year the Library has received as presents the 

 publications of 



11 English Scientific Societies and Institutions, 



27 Poreign and Colonial Scientific Societies and Institutions, 



and numerous pamphlets from various individuals. A few standard works 

 of reference have been purchased, and a number of periodicals bound. 



Ohservatory and Grounds. — H.M. Commissioners of "Woods and Forests 

 have painted the exterior of the building and put the roof into thorough 

 repair. 



The gravelled footway, mentioned in the last Eeport, has also been 

 made across the Old Deer Park to the Observatory. 



During the high tides of last winter the Thames overflowed its banks 

 in the neighbourhood of the Observatory, and the basement was flooded, 

 but no damage was done to any of the instruments. 



