Report of Magnetical Observations at Falmouth Observatory 

 for the Year 1895. Latitude 50° 9' 0" N. and Longitude 

 5° 4' 35" W. ; height, 167 feet above mean sea-level. 



These observations have been made by instruments purchased from 

 the Government Grant Fund administered by the Royal Society. 



The peculiar difficulties attending the proper working of the 

 Vertical Force Magnet, reported in 1894, have not been overcome, 

 and the results obtained are not sufficiently reliable for publication. 

 The Committee contemplate approaching the Royal Society, with a 

 view to having a new Vertical Force Magnet provided in place of the 

 present defective instrument. 



Photographic curves of Magnetic Declination and of Horizontal 

 Force variations have been taken regularly throughout the past year, 

 and the magnets have worked satisfactorily. 



The scale values of the instruments were determined on 2nd 

 January, 1896. The following values of the ordinates of the photo- 

 graphic curves were then found : — 

 Declination, 1 cm = 0° ll'*7. 

 Bifilar, for 1 cm. B H., = O00050 C.G.S. unit. 



The principal magnetic disturbances recorded during the year 

 occurred on the following dates : — February 9, 10, 15, 16, March 

 13, 14, April 11, October 13, 14, 29, November 9, 10, 24. 



Observations with the Absolute Instruments have been made 

 monthly, of which the following is a summary : — 



Determinations of Horizontal Intensity, 38. 



,, Inclination, 37 sets of four. 



„ absolute Declination, 39. 



Following the method adopted in the four previous years, it is 

 intended that the observations be reduced, and that the Declination 

 and Horizontal Force curves for five quiet days in each month of the 

 year — selected by the Astronomer Royal — be tabulated and prepared 

 for publication, in accordance with the International scheme. The 

 results will be printed in the Royal Cornwall Polytechnic Society's 

 Annual Report, and also in the " Proceedings " of the Royal Society. 



The following are the principal results of the magnetic element? 

 for the year 1894 : — 



Mean Westerly Declination, 18° 54' f 5. 

 Mean Inclination, 67° 0'*4. 



Mean Horizontal Force, 0*18547 C.G.S. unit. 

 VOL. lix. 2 G 



