XXXii REPORT — 1855. 



have affixed to them descriptive labels in French and English. The annexed 

 copy of these labels will best explain tlie nature of the collection. 



" The instruments exhibited by the Kew Committee have been put in 

 charge of M. de Fontaine Moreau, Avho has agreed to keep them in good 

 order during the continuance of the Exhibition for the sum of £10. It 

 would, I think, have been of great advantage if there had been, besides, 

 some competent person appointed by the English Commissioners to take a 

 general superintendence of the whole collection of Philosophical Instruments 

 exhibited, and who, being always on the spot, could give any information 

 required by visitors. 



" You will see by the account of the expenses, which I have already 

 handed to you, that there has been expended the sum of £14'1 4s. Id., 

 which already exceeds the amount of the grant from the Board of Trade. 

 Some considerable expense will still be necessary for the protection of the 

 Instruments in Paris, as well as for having them repacked and sent home at 

 the close of the Exhibition. The amount of this I cannot at present esti- 

 mate, but it will not I believe exceed £50. 



" It will be borne in mind that these expenses do not include any return 

 to the funds of the Observatory, on account of the loss of the services of 

 their Assistants during the very considerable period which has been devoted 

 to the preparation of the Instruments and their arrangement in Paris. This 

 period has been little (if at all) short of three months, and the consequent 

 pecuniary sacrifice by the Committee cannot be estimated at less than £60 

 or £70, independently of the very serious inconvenience sustained in the 

 derangement of the general work of the Observatory. 



" I am, dear Sir, 



" Yours faithfully, 



" To J. P. Gassiot, Esq., F.R.S., " J. Welsh. 



Chairmau of the Kew Observatory Committee. 



" Copy of the Labels affixed to the various Instruments and Apparatus 

 deposited by the Keio Observatory Committee in the Paris Universal 

 Exhibition. 



" 1. Declination Magnetometer employed in the British Colonial Magnetic 

 Observatories, under the superintendence of Colonel Edward Sabine, R.A., 

 F.R.S. &c. &c. Constructed by Grubb of Dublin, on the model of the 

 instrument used in the Dublin Magnetic Observatory, under the direction 

 of Dr. Lloyd, F.R.S. 



" 2. Bifilar Magnetometer, for observations of the variations of the hori- 

 zontal magnetic intensity, employed in the British Cofbnial Observatories, 

 under the superintendence of Colonel Edward Sabine, R.A., F.R.S. &c. &c. 

 Constructed by Grubb of Dublin, on the model of the instrument used in the 

 Dublin Magnetic Observatory, under the direction of Dr. Lloyd, F.R.S. 



" 3. Balance Magnetometer, for observation of the variations of the ver- 

 tical magnetic intensity, employed in the British Colonial Magnetic Obser- 

 vatories, under the superintendence of Colonel Edward Sabine, R.A., F.R.S. 

 Devised by Dr. Lloyd, F.R.S., and constructed by Robinson of London. 



" 4. Dip-circle with Microscopes, for observation of the magnetic inclina- 

 tion, furnished with Deflection Bars, for observation of the absolute vertical 

 intensity, by the method of Dr. Lloyd. Constructed by Barrow and Co., 

 London. 



" 5. Standard Compass used in the British Navy, with Sabine's Deflection 

 Apparatus. Constructed by Barrow and Co., London. 



