302 Chronometers. 



um of Three Hundred Pounds. The extreme variation of these 

 five chronometers was as follows : 



// /// 

 In 1828, No. 1410 in 12 months 1.41 actual extreme variation. 



183^ 



In 1830, one of our chronometers was entitled to the second prize, 

 and some others of our making were within the limits. 



In the trial of 1831, the chronometers made by us obtained the 

 whole of the three prizes, and another was fifth on the trial list. 

 We may be excused for making particular references to the trials of 

 this year; from the remarkable circumstance, that in all the preceding 

 years, from 1822, when the trials for prizes were first established, a 

 period in which several hundreds of chronometers had been sent for 

 trial, but four had performed within one second of extreme variation 

 in the twelve months, whilst in this trial the whole of our four 

 chronometers went within less than a second of extreme variation. 

 The following being the extreme variation as published by the As- 

 tronomer Royal. 



// /// 



No. 311 in twelve months 0.70 actual extreme variation. 



2 do. 0.86 



665 do. 0.89 



1 do. 0.99 



In 1832 and 1833, chronometers made by us were entitled to pri- 

 zes • and several others of our manufacture have been frequently 

 within the limits prescribed by the Goverment, forming a large pro- 

 portion of the best chronometers submitted to public trial. 



It has been repeatedly suggested to us, that a principle so im- 

 portant as ours has proved to be, should be imparted to the public, 

 as every thing tending to the improvement of chronometers is a mat- 

 ter of national concernment. We are willing to give up to the pub- 

 lic the benefit of our knowledge and experience on these matters, 

 on receiving as others have done, an adequate compensation for the 

 value which the discovery is of to us in our private business; but 

 we hold ourselves justified in withholding an explanation of the prin- 

 ciple, until it either ceases to be of importance, or we are adequate- 

 ly renumerated for disclosing it. 



Goverment having directed that the public trials of chronometers 

 at Greenwich, for prizes, shall cease after the present year, a few 



