[ 320 ] 



L. Proceedings of Learned Societies. 



ROYAL SOCIETY. 

 [Continued from p. 262.] 

 Dec. 16, 'THHE following papers ■were read, viz. : — 



1841. JL "Papers from tlie several Magnetic Observatories 

 established in India, addressed to the Secretary of the Royal Society, 

 by direction of the Honourable East India Company." Communi- 

 cated by P. M. Roget, INI.D., Sec. R.S. 



1. The Magnetic Observatory at Singapore. 



Twenty-seven anemometer curves. Eight magnetic observations 

 for February 1841. Anemometer curves for March, April and May 

 1841. Magnetic observations made on the term-da}^s in November 

 and December 1840, and January 1841, with an abstract of the 

 magnetic and meteorological instruments, from the commencement 

 of December 1 840 to the end of January 1841. 



Daily curves of certain magnetic instruments during the months of 

 December 1840 and January 1841. Monthly curves foi* December 

 1840 and Januaiy 1841. 



2. The Magnetic Observatory at Madras. 



Term-day curves for the months of January, Februaiy, March, 

 April, May and June 1841. 



Monthly observations of the magnetical and meteorological instru- 

 ments for August ; also two absolute determinations of the horizon- 

 tal intensity, taken in January and April 1 84 1 . 



Monthly and term-day observations for May, June and July 1 841 . 



Magnetic dip and intensity taken at Johanna, Madras and Singapore. 



3. The Magnetic Observatory at Simla. 



Magnetic and meteorological observations for January, February, 

 Marcli and April 1841 ; also transcripts of sheets D. for January, 

 February and March 1841, to be substituted for similar sheets for 

 those months. 



Preliminary ol)servations regarding the Magnetic Observatory at 

 Simla for May 1 84 1 . 



Observations for June 1841, including term-day curves; also a 

 general abstract of the mean readings of the instruments. 



Magnetic term observations for July and August 1841, made at 

 the Magnetic Observatory, Simla. 



4. " Variations de la declinaison et intensite horizontale magne- 

 tique obsen-ees a Milan, pendant 24 heures de suite, le 28 et 27 No- 

 vembre 1841." Par Signer Carlini, For. Memb. R.S. 



5. " On a Calculating Machine." By the Rev. Henry Moseley, 

 M.A., F.R.S., Professor of Natural PhilosoiDhy and Astronomy in 

 King's College. 



The object which the author proposes to accomplish in the con- 

 struction of this machine, is to determine mechanicall}' the jiroducts, 

 quotients, logarithms, squares, and other powers of the natural num- 

 bers, by means of combinations of greater simplicit}^ than have hi- 

 therto been applied to the jnirposes of mechanical calculation. The 

 paper is accompanied by a figure illustrating tlie principle of the ma- 



