106 Report of the Kew Committee. 



Thermometers, ordinary Meteorological 1238 



„ Boiling-point Standards 64 



„ Mountain 20 



Clinical 1439 



2761 



In addition, 272 Thermometers have been tested at the melting-point 

 of mercury. 



The Committee are glad to say that this department of the operations 

 at Kew shows a very satisfactory increase in utility, as is proved by the 

 following statement, showing the fees paid for the verification of 

 Barometers and Thermometers during the three years 1873-75 : — 



Barometers. Thermometers. Total. 



£ s. d. £ s. d. £ s. d. 



1873 .... 72 5 110 17 6 183 2 6 



1874 .... 55 10 157 16 213 6 



1875 .... 88 7 214 17 303 4 



The increase has been mainly under the head of instruments received 

 from opticians. 



The Committee have it in contemplation to improve the utility of Kew 

 for the verification of instruments by opening an office in London for 

 their receipt, so as to relieve opticians from the trouble of sending the 

 instruments to Kew and fetching them back again. 



13 Standard Thermometers have been calibrated and divided at Kew. 



The following is the list of miscellaneous instruments which have 

 been verified : — 



Hydrometers 150 



Rain-gauges 3 



Dial Anemometers (Eobinson's) 6 



A Thermograph has been tested and its scale-values determined for 

 the Mauritius Observatory. 



A double box Sextant, together with a Transit-Theodolite, has been 

 obtained, verified, and forwarded to Major Knight in India. 



The apparatus devised by Mr. F. Galton for facilitating the veri- 

 fication of Thermometers, which was mentioned in the last Report, has 

 been erected at Kew, and has been found of great service, especially 

 in the way of affording means of maintaining high temperatures for a 

 considerable length of time. 



A number of tubes of exceptional range, for the construction of 

 Standard Thermometers, have been added to those at present in stock. 



"With reference to the testing of Anemometers, as mentioned in last 

 Beport, with the hope that the experiments with artificial rotation would 

 be resumed on a future occasion, it has been found that the large expense 





