REPORT OF THE KEW COMMITTEE. ]xix 



(4.) The curve should be taken off at lO** 30™ a.m., and a new one replaced 

 if possible at 10'' 32'", Greenwich mean time. 



(5.) Every change made in the instrument, every stoppage of clock, &c., 

 and all peculiarities in the curve noticed by the observer, should 

 be recorded on the blank part of the sheet of metallic paper, with 

 the exact time attached thereto. The orientation should be tested 

 once a month. 



(6.) The previous week's curves and tabulations should bo sent to Kew 

 every Thursday, as recorded in the diary. 



Central Observatory (Assistant). 



(7.) The assistant at Xew shall examine each curve in order to see if both 



pencUs work well and freely, and if the paper has been accurately 



attached to the cylinder, and if the cylinder has not slipped. 

 (8.) He shall see that the clock has been in good order during the time of 



the curve. 

 (9.) That the curve is properly written upon after the pattern adopted. 

 (10.) That in the writing upon the curve the proper day of the month ia 



placed alongside the day of the week. 

 (11.) That the times of putting on and taking off as recorded by the 



pricker do not differ more than five minutes from the chronometer 



time. 

 (12.) He shall inspect the direction- and velocity-curves in connexion with 



the tabulated results, in order to ascertain that each curve is 



tabulated under its proper date. 

 (13.) Check the accuracy of the subtractions made in the tables of the 



subsidiary direction measurements. 

 (14.) Examine all cases in which A — B is greater than two points, and if 



an error is revealed it ought to be corrected at once. 

 (15.) Check the accuracy of the velocity tabulations, according to the 



method herein indicated. 

 (16.) Make fortj' remeasurements for each month, both for direction and 



velocity, as in the case of the other instruments. 



Central Ohservatory [Director). 



(17.) The assistant at Kew shall bring before the Director of the Central 

 Observatory all curves, with their corresponding tabulations, that 

 are deficient from any cause, and the Director shall make the neces- 

 sary remarks on the curves and tabulations, or cause them to be 

 made, and shall communicate all cases of failure to the Meteoro- 

 logical Committee on the one hand, and to the Director of the ob- 

 servatory where the failure occurred on the other, making any 

 remarks that may tend in his estimation to obviate in future the 

 causes of failure. 



(18.) The Director of the Central Observatory shall also communicate as 

 above the result of the forty remeasurements made at Kew. 



