452 Report of the Kew Committee. 



Barometers, Standard 68 



,, Marine and Station 77 



Aneroids 51 



Total 196 



Thermometers, ordinary Meteorological .... 1286 



„ Standard 67 



,, Monntain 43 



Clinical 3405 



,, Solar radiation 27 



Total 4828 



Besides these 53 Deep-sea Thermometers have been tested, the 

 greater number of which were subjected in the hydraulic press, 

 without injury, to strains exceeding three and a-half tons on the 

 square inch. 



8 Thermometers liave been compared at the freezing point of 

 mercury . 



Duplicate copies of corrections have been supplied in 54 cases. 



12 Standard Thermometers have been calibrated and divided, a set 

 of three being specially constructed for the experiments on Air Ther- 

 mometers now in progress under Dr. Thorpe at Leeds. 



2 Thermograph Tubes were examined for the Zi-Ka-TVei Obser- 

 vatory, Shanghai. 



A pair of special Thermometers have been selected, verified, and 

 forwarded to the Royal Observatory, Naples. 



The following miscellaneous instruments have also been verified : — 



Hydrometers 120 



Anemometers 2 



Rain Gauges .a 6 



Sextants 4 



Theodolites 5 



There are at present in the Observatory undergoing verification, 

 26 Barometers, 400 Thermometers, and 4 Rain Gauges. 



The comparison of Messrs. Hottinger's Aneroids being completed, 

 the Superintendent drew up an account of the instruments and their 

 performance, which he read before the Meteorological Society. 



The paper was published in the " Quarterly Journal," vol. v, 

 p. 189, and the Aneroids were transferred to the care of Mr. Hicks, 

 whom Messrs. Hottinger have appointed their agent in this country. 



Several attempts made to verify Thermometers at high tempera- 

 tures having failed, it is intended to construct a special apparatus 



