108 
COLONEL SABINE ON THE PERIODICAL LAWS DISCOVERABLE 
Toronto, in the easterly disturbances the ratios are greater than unity in the night hours, 
or from 6 p.m. to 6 a.m., and less than unity in the day hours, or from 6 a.m. to 6 p.m,; 
but in the westerly disturbances the ratios are greater than unity from midnight to 
noon, and less than unity from noon to midnight. Dividing the twenty-four hours 
into four six-hourly divisions as before, we have the mean ratios as follows : — 
Table V. 
Toronto. 
Hobarton. 
Hours of local time. 
Numbers. 
Values. 
Numbers. 
Values. 
Day ... 
f 6 to 1 1 A.M. inclusive 
1-33 
1-60 
1-29 
1-34 
\ Noon to 5 P.M. inclusive ... 
0-93 
0-74 
1-30 
1-31 
Night 
j6 P.M. to 11 P.M. inclusive... 
0-62 
0-52 
0-61 
0-59 
t Midnight to 5 a.m. inclusive 
M2 
M3 
0-78 
0-77 
By means of this Table we may perceive more immediately, and therefore perhaps 
more distinctly, the respects in which the westerly disturbances at Toronto and the 
easterly at Hobarton agree, and those in which they differ. They agree in the ratios 
of frequency and aggregate value being above unity from 6 a.m. to noon, and below 
unity from 6 p.m. to midnight. They differ in the ratios being at Toronto above, 
and at Hobarton below unity, from midnight to 5 a.m., and at Toronto below, and 
at Hobarton above unity, from noon to 5 p.m. 
The hours of maximum, 7 and 8 a.m., are the same at both stations; as are the 
hours of minimum, 8 to 10 p.m. 
The ratios of the average values in this division of the disturbances are as 
follows ; — 
Table VI. 
Hours of local 
astronomical 
time. 
Toronto. 
Westerly. 
Hobarton. 
Easterly. 
Hours of local 
astronomical 
time. 
Toronto. 
Westerly. 
Hobarton. 
Easterly. 
b 
h 
18 
1-33 
1-09 
6 
0-84 
M4 
19 
1-75 
M7 
7 
0-84 
0-98 
20 
1-31 
M2 
8 
0-78 
0-87 
21 
1-40 
1-01 
9 
0*82 
1-09 
22 
0-97 
0-98 
10 
M4 
0-77 
23 
0*84 
0-96 
11 
0-81 
0-85 
0 
0-84 
0-93 
12 
1-13 
0-85 
1 
0-76 
0-90 
13 
1-14 
0-87 
2 
0-88 
0-96 
14 
0-91 
0-90 
3 
0-78 
1-04 
15 
0-88 
0-98 
4 
0-81 
1-06 
16 
0-93 
0-98 
5 
0-84 
M4 
17 
1-31 
1-33 
Here also there is a partial accord and a partial difference between the stations. 
The ratios are above unity at both stations from 5 to 9 a.m. inclusive ; they are also 
above unity at Toronto at midnight, at 10 p.m. and 1 a.m., and at Hobarton from 
