498 Report of the Kew Committee. 



Duplicate copies of corrections have been supplied in 63 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 23 



ordinary meteorological 20 



Various 150 



3 Standard Thermometers have also been calibrated, and supplied 

 to 3 applicants during the year. 



There are at present in the Observatory undergoing verification, 

 4 Barometers, 777 Thermometers, 51 Hydrometers, 14 Sextants, and 

 42 Telescopes. 



The increase in the number of sextants verified during the past 

 year has been considerable, 346 instruments of that kind having been 

 tested, whereas the greatest number in any previous year has been 

 292. 



VI. RATING OF WATCHES. 



During the year 513 entries of watches for rating were made. 

 They were sent for testing in the following classes : 



For class A, 450 ; class B, 49 ; and class C, 9 ; subsidiary trial, 5. 



Of these 128 failed to gain any award ; 10 passed with C, 41 with B, 

 329 with A certificates, and 34 of the latter obtained the highest, 

 class A especially good. 



In the Appendix will be found statements giving the results of 

 trial of the 26 watches which obtained the highest numbers of marks 

 during the year, the highest position being attained by Mr. A. E. 

 Fridlander, of Coventry. His watch was a keyless double roller with 

 going barrel, which obtained 86'1 marks out of a possible 100. 



At the request of several watch makers, the Committee have slightly 

 modified the regulation for the granting of certificates for watches 

 which have been rated. The chief alteration is in the conditions 

 requisite for affixing the words especially good to a Class A certificate. 

 These are now simplified so that all watches which have 80 marks 

 and upwards awarded to them after trial are entitled to be charac- 

 terised as especially good. 



Marine Chronometers. Certificates showing the mean daily rate 

 and the variations of rate at three different temperatures have been 

 awarded to 3 marine chronometers after undergoing the 35 days' trial. 



An Astronomical Regulator for the Observatory at Akassa, Royal 

 Niger Company's Territory, has also been rated at temperatures of 60 

 and 80 Faht. 



