162 ON MAGNETIC DISTURBANCES AT TORONTO. 
b Ee oe | 2 4 . 
2/8] | (Ee /2/8\8 
u S FI e o be bn ~ ° Oo 7) 
Al) avila | ver iuelue dics a) sili ia doe ime 
sla l Sats 1s 1s |] aie Vo |e te 
1844 to 1848 from 
24 observations | | 
Glipeasasoood 1.29)1.27/1.40/1.04)1.29'3.82/1.41/1 96/1.29/1.21/0. 77/0. 74 
1856 to 1862 from 
6 observations 
daily ..... oe - /0.85/0.86]2.35)1.2911.84/3.46/1.87)1 53)/1.26/0.54/1. 15/0. 70 
The relative amount of easterly and westerly disturbances of decli- 
nation, and of the disturbances which increase and decrease the total 
force and inclination, are indicated by the following ratios, whereby it 
will be noticed, that while the preponderance of easterly over westerly 
disturbances has increased the preponderance in the disturbances which 
decrease the force, and in those which increase the inclination, has. 
become much less in the later series. 
Total Force|Inclination 
Decreasing |Increasing 
Ver’l Force 
Decreasing 
Declination! Hor Force 
Kast |Decreasing 
to to to to to 
West. (Increasing. |Increasing. | Increasing. | Decreasing. 
1844 to 1848 from 24 
observations daily. 1.28 6.4 1.4 1.9 5.6 
| 
1844 to 1848 from 6 
observations daily. 0.9 5.4 1.5 1.9 
1856 to 1862 from 6 
observations daily. 1.28 Ss) 1.1 1.4 3.5 
In table III. and IV. containing the absolute and relative amount 
of disturbance in different years, it appears that 1856-57 were years 
of minimum, and 1860 a year of maximum disturbance. The year 
1859 shows a breach of continuity, its disturbances, excepting those 
of declination, amounting to less than those of 1858 and 1860. If 
the years commencing January Ist are compared, 1859 becomes the 
maximum year, but in this case, the disturbances of 1861, are, in 
in several instances, slightly less than in 1860 and 1862. One striking 
peculiarity in these tables, consists in the extraordinary amount of dis- 
