Report of the Kew Committee. 23 



3 Dip-circles for Mr. L. P. Casella, London. 

 2 Dipping-needles for H.M.S. ' Challenger.' 

 An Azimuth Compass for Mr. Ney Elias, E.E.G.S. 



Determinations of the Moments of Inertia have been made of two 

 magnets used by Capt. E. J. Evans, C.B., E.E.S., when swinging iron 

 ships. 



Several instruments are on hand awaiting verification. Among them 

 may be mentioned a Unifilar and Dip-circle received from Prof. Stewart, 

 for use abroad, and a set of Magnets, for determination of their con- 

 stants, destined for the observatory of Don Luiz at Lisbon. 



At the request of the Eev. S. J. Perry, a complete set of Magneto- 

 graphs have been ordered for transmission to Zi-ka-wei, near Shanghai, 

 to the Eev. A. M. Colombel, who received instruction at Kew in the year 

 1868. 



The meteorological instruments which have been verified are as fol- 

 lows : 



Barometers, Standards 49 



Marine and Station 110 



159 

 Aneroids 20 



Thermometers, ordinary Meteorological 782 



Boiling-point Standards 29 



Mountain 52 



Clinical 1233 



2096 



In addition, nine Kew Standard Thermometers have been calibrated 

 and divided at Kew, and two glass tubes have been graduated to milli- 

 metres. 



The following miscellaneous instruments have also been verified : 



Eain-gauge, 1, with graduated glass. 

 Eobinson's Dial-anemometer, 1. 



Allusion was made in the last Eeport to the difficulty of testing ane- 

 mometers, owing to the limitation of space at disposal for the purpose. 

 In the course of the year a grant was obtained from the Government- 

 Grant Committee for the purpose of carrying on a series of such experi- 

 ments ; and a piece of ground in the Park has been rented. Several 

 anemometers, of various constructions, have been erected therein, and 

 experiments are still in progress. 



A Pressure-plate Anemometer, by Mr. Oxley, of Manchester, has been 

 tested, but not with satisfactory results. 



