82 Report of the Kew Committee. 



2. This maximum effect must not exceed + 5 seconds. 



3. In addition to the above 24-hour trials, the watch with a view 

 of testing its starting, stopping, and recording qualifications is also 

 subjected to shorter tests, varying from a few seconds to an hour or 

 more in duration. 



4. When the chronograph mechanism is in action, and pressure is 

 applied to the knob or push-piece, the chronograph hand or hands 

 must either stop dead at once, or else must run on unaffected until 

 stronger force is used. 



5. There must be a complete absence of " lagging," and moving 

 only in spasmodic jumps, when pressure is applied, and perfect absence 

 of recoil when the chronograph hand is stopped. 



6. The hands must return to, and start exactly from, the zero 

 mark, and in the case of split seconds they must run together in exact 

 accordance. 



7. The times shown by the minute-recorder must agree with the 

 position of the fly -back hand. 



8. When the chronograph action of a watch has been tested in 

 addition to the trial of its ordinary time-keeping qualities an endorse- 

 ment of the result will be made upon the certificate ; and chrono- 

 graph watches with certificates without this endorsement will be 

 recognised as having been examined as ordinary watches only. 



Marine Chronometers. Certificates of mean daily rate and of 

 variations of rate at each temperature have been awarded to 12 

 marine chronometers after undergoing the 35 days' trial as specified 

 in the regulations. 



VII. MISCELLANEOUS. 



Assistance to Observatories, fyc. Prepared photographic paper has 

 been, procured and supplied to the Observatories at Batavia, Colaba, 

 Falmouth, Lisbon, Mauritius, Oxford, St. Petersburg, Stonyhurst, 

 and Toronto, as well as also to the Meteorological Office and the U.S. 

 Navy Department. 



Anemograph sheets have likewise been sent to Coimbra and 

 Mauritius, blank forms for entry of observations, &c., have also been 

 distributed to various applicants. 



Hongkong Observatory. This observatory was founded by H.M. 

 Government in 1883, partly on the recommendation of the Kew Com- 

 mittee, in order amongst other objects to obtain continuous observa- 

 tions of terrestrial magnetism and meteorology in the eastern hemi- 

 sphere between Java and Zi-Ka- Wei. 



The Committee have recently been consulted by the Secretary of 

 State for the Colonies as to the advisability of suspending the mag- 

 netic work of the Chinese Observatory for a period of three years, 



