Report of the Kew Committee. 4()i) 



Thermometers, ordinary Meteorological 1225 



Standard 83 



Mountain 164 



Clinical 8726 



Solar radiation 42 



Total 10240 



Hydrometers 1161 



Anemometers 2 



Bain Gauges 3 



Sextants 64 



Index and Horizon Glasses, unmounted 87 



Dark Glasses, unmounted 254 



Besides these, 13 Deep-sea Thermometers have been tested, 4 of 

 which were subjected, in the hydraulic press, without injury, to 

 pressures exceeding two tons on the square inch. 142 Thermometers 

 have been compared at the freezing-point of mercury, making a total 

 of 10395 for the year. 



Duplicate copies of corrections have been supplied in 30 cases. 



The number of instruments rejected on account of excessive 

 error, or which from other causes did not record with sufficient 

 accuracy, was as follows : 



Thermometers, clinical 40 



ordinary meteorological 2 



Various 27 



10 Standard Thermometers have also been calibrated, and supplied 

 to societies and individuals during the year. 



A Thermograph has been examined, and had its scale values deter- 

 mined, for the Japanese Government. A Richard Temperature 

 Recorder, a Self -registering Aneroid, an Electrograph, and a Richard 

 Humidity Recorder, have also been tried. 



There are at present in the Observatory undergoing verification, 

 32 Barometers, 742 Thermometers, 14 Hydrometers and 10 Sextants. 



VI. RATING OF WATCHES. 



The arrangements for rating watches mentioned in last year's 

 Report have been completed and brought into operation successfully, 

 at a cost of 193. 



A second safe having been purchased by the Committee, an appa- 

 ratus was fitted to it which enables the enclosed watches to be 

 maintained continuously at either high temperatures, without being 

 subjected to injury by fumes of gas, or at low temperatures. 



