Falmouth Observatory for the Year 1894. 531 



The Inclination is the mean of the absolute observations, the mean 

 time of which is 3 P.M. 



In Table Y, X is the mean of the absolute values observed during 

 the month (generally three in number), uncorrected for diurnal 

 variations and for any disturbance. Y is the mean of the products of 

 the Dips and X. 



The results in the following tables, Nos. I, II, III, IV, are deduced 

 from the magnetograph curves which have been standardised by 

 observations of deflection and vibration. These were made with 

 the Collimator Magnet marked 66A, and the Declinometer Magnet 

 marked 66c in the Unifilar Magnetometer by Elliott Brothers, of 

 London. Table No. V is deduced from these observations. 



The temperature correction (which is probably very small) has not 

 been applied owing to temporary change in the relation of the curve 

 to the base line, caused by additions to the external gas-pipes. 



The Inclination was observed with the Inclinometer No. 86, by 

 Dover, of Charlton, Kent, and needles 1 and 2, which are 3^ ins. 

 in length, the results of which appear in Table VI. 



The Declination and Horizontal Force values given in Tables I to 

 IV are prepared in accordance with the suggestions made in the 

 fifth report, of the Committee of the British Association on com- 

 paring and reducing magnetic observations, and the time given is 

 Greenwich mean time, which is 20 min. 18 sec. earlier than local time. 

 The following is a list of the days during the year 1894 which 

 were selected by the Astronomer Royal, as suitable for the deter- 

 mination of the magnetic diurnal variations, and which have been 

 employed in the preparation of the magnetic tables : 



January 9, 15, 19, 20, 27. 



February 8, 10, 11, 14, 17. 



March 5, 7, 13, 28, 29. 



April 4, 11, 16, 22, 23. 



May 6, 11, 12, 19, 27. 



June 7, 13, 15, 26, 27. 



July 7, 10, 14, 26, 31. 



August 2, 10, 17, 18, 28. 



September 3, 4, 6, 13, 26. 



October 10, 11, 12, 23, 28. 



November 4, 5, 12, 21, 22. 



December 4, 11, 25, 26, 27. 



The whole of the instruments have been maintained in good order. 

 The Magnetic Chamber and the Magnetic Hut in the garden have 

 been kept in a satisfactory state of dryness during the year, save 

 for six days in November, when the Chamber was flooded owing to 



excessive rainfall. 



EDWARD KITTO, 



Magnetic Observer. 



