ANALYSIS OP THE 



Between 



Number of di.sturbances. 



l.'l and 2.'1 . 



109G 



2.1 " 3.1 . . . 



247 



3.1 " 4.1 . 



65 



4.1 " 5.1 . 



27 



5.1 " 6.1 . 



5 



6.1 " 7.1 . 



3 



7.1 " 8.1 . 



3 



beyond 



none. 



ANALYSIS OF THE DISTURBANCES OF THE TOTAL FORCE. 



The number of values of total force differing 0.00094 parts of the force from its 

 normal amount, and which constitute the disturbance values, is 14:70, which have 

 been combined in a manner similar to that of the disturbances of the dip ; an increas- 

 ing total force is indicated by a + sign, a decreasing one by a — sign. The aggre- 

 gate amount and mean amount of disturbances are expressed in parts of the force, 

 and the letter n indicates the number of disturbances. In the tables of the annual 

 inequality the series commences with July, 1841, in those of the diurnal inequality 

 it commences with February, 1841. The ratios given are those of the aggregate 

 amount. 



Table YIJ. — Aggregate 



AMOUNT AND NUMBER OF 



Disturbances of the Total Force in 



EACH Month, divided into 



Disturbances which Increase and which Decrease the Force. 1 



The values In brackets for January, February, and March are 



interpolated, and are the average values of the | 



corresponding mouths of the year preced 



ng and the year following. 







1841 and 1S42. 



1842 and 1S43. 



1843 and 1844. 1 



+ 



n 



- 



n 



+ 



n 



- 



n 



+ 



n 



- 



n 



July . 



.02944 



25 



.04552 



32 



.01115 



8 



.02518 



15 



.00000 







.00377 



3 









.01239 



10 



.00438 



4 



.00758 



5 



.02658 



24 



.00830 



8 



.00200 



2 



September 







.01759 



15 



.02807 



19 



.02395 



16 



.06228 



42 



.01355 



10 



.00734 



7 







•02(J58 



20 



.00697 



6 



.01148 



10 



.00410 



4 



.00663 



5 



.00585 



5 









.02357 



17 



.02413 



20 



.00781 



6 



.00960 



9 



.01563 



13 



.02485 



21 









.07598 



47 



.05026 



35 



.00715 



7 



.00898 



7 



.03267 



28 



.00645 



6 









.06321 



38 



.04939 



36 



(.04792) 



(32) '(.03222) 



(24) 



.03264 



27 



.01506 



13 



February 







.07043 



50 



.03481 



28 



(.04151) 



(30) (.01984) 



(16) 



.01259 



10 



.00486 



4 









.01895 



15 



.02730 



19 



(.02711) 



(22) 



(.02574) 



(19) 



.03527 



29 



.02419 



19 



April . 







.04122 



28 



.02820 



19 



.03523 



24 



.02084 



18 



.02181 



19 



.01940 



14 







.04586 



27 



.02443 



16 



.02697 



17 



.01736 



14 



.00977 



6 



.00000 







June . 







.02777 



21 



.01191 



11 



.00561 



3 



.01038 



7 



.00342 



3 



.02193 



20 





1844 and 1845. 



Snms 1841 to 1843. 



Ratios. 



+ 



n 



- 



n 



+ 



n 



- 



n 



- 



+ 



July .... 



.00805 



8 



.01076 



9 



.04864 



41 



.08523 



59 



0.56 





1.28 



August 







.04661 



35 



.01348 



10 



.07488 



58 



.04644 



40 



0.87 





0.70 



September 







.00715 



5 



.001 08 



1 



.06224 



46 .09877 



69 



0.72 





1.48 



October 







.00331 



3 



.00809 



5 



.04800 



38 



.02501 



20 



0.56 





0.38 



November 







.00000 







.00100 



1 



■ .04701 



36 



.05958 



51 



0.54 





0.89 



December 







.01365 



12 



.00416 



4 



.12945 



94 



.06985 



52 



1.50 





1.05 



January 







.00210 



2 



.00543 



4 



.14587 



99 



.10210 



77 



1.68 





1.53 



February 







.00000 







.00216 



2 



.12453 



90 



.06167 



50 



1.44 





0.92 



March 







.02489 



20 



.01231 



11 



.10622 



86 



.08954 



68 



1.23 





1.34 



April . 







.00513 



4 



.00463 



3 



.10339 



75 



.07307 



54 



1.20 





1.10 



May . 







.02511 



12 



.00211 



2 



.10771 



62 



.04390 



32 



1.24 





0.65 



June . 







.00270 



2 



.00108 



1 



.03950 



29 



.04530 



39 



0.46 





0.68 



