94 



Report of the Kew Committee. 



neighbouring town of Richmond, where he has erected a Sheepshanks 

 33-inch transit (No. 27) lent by the Royal Astronomical Society. 

 The apparatus used for determining the temperature correction of 

 aneroids is being fitted up to receive the watches for rating them at 

 extreme temperatures, and arrangements are in progress for their 

 reception and delivery at the Meteorological Office by Mr. Strachan, 

 and at the Horological Institute, Northampton Square, by Mr. Britten, 

 the Secretary. 



A circular has been drafted, which will be issued to watchmakers on 

 the completion of these arrangements, and it is hoped that operations 

 will be commenced early in the new year. 



Pendulum Experiments. — Professor C. S. Peirce, of the United States 

 Coast Survey, who made a series of pendulum observations at Kew 

 and elsewhere in 1876, visited the Observatory in July last, and made 

 a subsidiary series of experiments with a view of determining the 

 flexure of his stand when on the Kew piers, using for the purpose an 

 instrument termed a "noddy." 



Major J. E. Herschel, R.E., F.R.S., and Mr. Chaney, of the 

 Standards Department, visited the Observatory and witnessed some of 

 his experiments. 



The following magnetic instruments have been verified, and their 

 constants have been determined : — 



6 Unifilar Magnetometers for Elliott Brothers, London. 

 2 Dip Circles for Casella, London. 

 1 Dip Circle for Dover, Charlton. 



There have also been purchased on commission and verified : — 



A Unifilar Magnetometer for Professor Brioschi, Naples. 



A Unifilar Magnetometer for Professor Ferrari, Rome. 



A Dip Circle for Professor Thalen, Upsala. 



A Dip Circle for Professor Ferrari, Rome. 



A complete set of Magnetometers for the Lyons Observatory, 



Two Dip Circles are at present undergoing examination : — 



The number of meteorological instruments verified continues still to 

 increase, having been in the past year as follows : — 



V. Verification of Instruments. 



France. 



Barometers, Standard 



45 

 114 



52 



Marine and Station 



Aneroids 



Total 



211 



