Report of the Kew Committee. 



375 



A new Cathetometer o£ great accuracy has been constructed and 

 erected against the Mural Quadrant wall. 



Two portable Barometers have been cleaned and repaired, in order 

 that they may be used in making a comparison between the Kew and 

 G-reenwich Standard Barometers at an early date. 



One Sextant has been verified. 



Meteorological data have been supplied to Prof. Balfour Stewart, Mr. 

 J. Gr. Symons, Mr. Lloyd, the Editors of the ' Illustrated London 

 News,' and the ' Times.' 



Chronometer Testing, — One Chronometer has been rated for an optician, 

 but no further steps have been taken towards making this a regular branch 

 of the Observatory work. 



Pendulum Exj^eriments. — Mr. 0. S. Peirce, of the United States Coast 

 Survey, who has recently been making pendulum observations at Berlin, 

 Geneva, and Paris, arrived at the Observatory in June ; after having had 

 the necessary fittings put up in the pendulum-room, he erected his appa- 

 ratus, and made a complete series of vibrations. He has since returned 

 to America. 



Instruction given. — Dr. E. van der Stok, Vice-Director of the Batavia 

 Observatory, has received instruction in the use of the self-registering 

 and absolute instruments, both magnetical and meteorological. 



Dr. Hamberg, of the Upsala Observatory, received some instruction in 

 the use of Meteorological instruments. Two assistants in the Standards 

 Department received instruction in the manipulation of Thermometers. 



Waxed Pa/per supj)lied. — Waxed paper has been supplied to the fol- 

 lowing Observatories : — 



Coimbra, 

 Colaba, 

 Lisbon, 

 Mauritius, 



Hadcliffe, 

 Stonyhurst, 

 and to 



The Meteorological Office. 



Loan Ea;hihition. — The Committee having been requested by the Science 

 and Art Department to exhibit objects of interest in their possession at 

 the Loan Collection of Scientific Apparatus, all the instruments either of 

 superseded patterns or duplicates which could be spared without sus- 

 pending the work of the Observatory were put in order at the expense 

 of the Department, and placed in the galleries at South Keusiugton. 

 Thirty-one articles (enumerated in the following list) are exhibited. 

 The Kew Photoheliograpb. 



Stand with 5 Photographs of the Sun, taken with the Kew Heliograph, and 1 



Photograph of a Scale. 

 Photographic self-registering Declination Instrument. 

 Photographic self-registering Horizontal-Force Instrument. 

 Eonalds's Photo -Barograph. 

 Balance Anemometer. 



Eonalds's Electrical Apparatus and Collector. 

 Kreil's Barograph. 



