ilSTURBANCES OF THE INCLINATION. 



exhibit the proportion of the amount of disturbances during any given sub-period 

 to the average amount of disturbances during the whole period. In the first and 

 three subsequent tables the values for the first five months of 1841 are omitted, as 

 there are no adequate means of extending the series beyond four fuU years. 



Table I. — Aggregate amount and number of Disturbances op the Inclination in each 



Month, divided into Disturbances which Increase and which Decrease the Inclination. 



The values in brackets for January, February, and Maroli, are interpolated, and are the average values of the 



corresponding months of the year preceding and the year following. 





1S41 and IS'12. 



lS-42 and 1S43. 



1843 and 1844. 



1844 and 184S. 



Sums 1841 to 1843. 



Ratio. 1 



+ 



n 



- 



n 



+ 



n 



- 



n 



+ 



10 



4. '4 



3 



+ 

 l.'l 



1 



12.'8 



8 



+ 



44 



- 



n 



+ 



- 



July . . 



24.'.') 



16 



15. '7 



10 



31. '5 



17 



17. '2 



9 



16.'9 



74. '0 



50.'1 



30 



0.55 



0.73 



August . 



U.fi 



16 



14.0 



9 



13.6 



8 



33.5 



22 



20.8 



13 



0.0 







42.4 



29 



3.9 



3 



111.3 



66 



51.4 



34 



0.83 



0.75 



Sept'ber . 



104.7 



40 



14.4 



10 



20.7 



9 



114.8 



64 



8.4 



4 



7.2 



6 



25.4 



14 



10.9 



6 



159.2 



67 



147.3 



86 



1.19 



2.15 



October . 



fi9.Y 



32 



13.6 



9 



19.5 



11 



40.2 



27 



7.2 



4 



10.1 



6 



10.0 



7 



21.8 



11 



106.4 



54 



85.7 



53 



0.79 



1.25 



November 



79.9 



31 



12.4 



5 



35.2 



16 



6.8 



4 



9.9 



7 



3.9 



3 



40.3 



19 



1.5 



1 



165.3 



73 



24.6 



13 



1.24 



0.35 



December 



75.5 



36 



27.2 



18 



12.4 



8 



9.5 



6 



29.6 



20 



4.9 



4 



31.7 



17 



37.3 



20 



149.2 



81 



78.9 



48 



1.12 



1.15 



January . 



72.3 



33 



40.5 



24 



(50.7) 



(27) 



(23.2) 



(14) 



29.1 



21 



5.9 



4 



23.7 



10 



7.7 



5 



175.8 



91 



77.3 



47 



1.31 



1.12 



February 



101.6 



45 



40.3 



26 



(57.6) 



(26) 



(22.2) 



(14) 



13.7 



8 



4.2 



3 



5.8 



3 



0.0 







178.7 



82 



66.7 



43 



1.34 



0.97 



March 



81.6 



17 



27.0 



16 



(■37.6) 



(20) 



(18.6) 



(12) 



43.4 



24 



10.3 



8 



19.1 



13 



5.5 



4 



131.6 



74 



61.4 



40 



0.99 



0.92 



April . . 



52.2 



26 



142 



10 



56.0 



30 



17.4 



10 



29.5 



20 



12.0 



6 



29.4 



17 



6.6 



4 



167.1 



93 



50.2 



30 



1.25 



0.73 



May . . 



41.1 



25 



30.5 



15 



39.7 



18 



34.5 



18 



7.9 



4 



1.6 



1 



22.0 



10 



4.7 



3 



110.7 



57 



71.3 



37 



0.83 



1.04 



June . . 



39.9 



21 



21.8 



13 



9.1 



7 



20.7 



11 



1.4 



1 



5.9 



4 



23.8 



17 



8.8 



5 



74.2 



46 



57.2 



33 



0.56 



0.84 



It would appear that during the colder season both sets of ratios present greater 

 values ; between September and February (inclusive) this ratio is, on the average, 

 1.16, and in the other months it is 0.84. Of the ratios decreasing the inclination 

 the September and November values are somewhat anomalous, the first too high, 

 the second too low. 



The following table gives the annual inequality of the disturbances, irrespective 

 of their sign. 



Table II. — Aggregate amount and number of Disturbances of the | 



Inclination in each Month. 







The series comprises the four years between July, 1841, and July, 1845. 



The ratio 



is that of the sums. 









Sum. 



n 



Eatio. 



July 



124.'1 



74 



0.62 



August 

















162.7 



100 



0.80 



September 

















306.5 



153 



1.51 



October 

















192.1 



107 



0.95 



November . 

















189.9 



86 



0.94 



December . 

















228.1 



129 



1.13 



January 

















253.1 



138 



1.25 



February . 

















245.4 



125 



1.22 



March 

















193.0 



114 



0.96 



















217.3 



123 



1.07 



May . 

















182.0 



94 



0.90 



June . 

















131.4 



79 



0.65 



The ratio near the autumnal equinox is the greatest of all, that about the vernal 

 equinox is a little below the average value ; the least value occurs probably near 

 the summer solstice. 



