ON THE EARTH’S MAGNETISM. 547 




TABLE XXIX. 
Third Week. Fourth Week. 
STATION, 
Maximum. Minimum. Maximum. Minimum. 
Dz H. D. ty, NEES D. aaa 
Toronto, . : A 14 2 15 93 
Makerstoun, j é 14 16 15 22 
Cape, . ; : : 14, 9 15 22 
Trevandrum, : F V4 AT 15 23 
Singapore, . : : he ee 15 22 
Hobarton an ; p 14 O 15 21 


The greatest difference in the epochs is to be found in the minima of the 
fourth week, varying from 214 125 at Hobarton, to 234 0+ at Makerstoun. The 
fourth week is also remarkable for the considerably greater movement at the 
Cape and Trevandrum than at Makerstoun. 
96. The fifth week includes a rather marked disturbance; we may note the 
hour when the daily mean force attained a maximum, commenced to diminish, 
and then began to increase. 
TABLE XXX. 
STATION. Maximum. Minimum. 
D. H. D. H. 
Toronto, : ‘ : ; ge SUS) 28% ho 
Makerstoun, . : : : 2s opel 8 28 19 
Cape of Good Hope, i j Milt lB 28> veh 
Trevandrum, . : : q Die ed 29 2-5 
Singapore, . } , ; 270619 29 2-5 
Hobarton, . : : f 27e-"h-21 29 1 


The commencement of the diminution may be considered simultaneous at all 
the stations, but the termination is not so. The end of the fall is simultaneous at 
Toronto, Makerstoun, and the Cape; and nearly simultaneous at the three other 
stations, though from 6 to 10 hours later than at the former three. The Cape, 
after the minimum, presents a curious difference from the other stations; the 
mean force, instead of increasing continuously after the minimum, increases only 
till 29° 04, after which it diminishes anew to a second and more marked mini- 
mum at 29° 18". 
VOL. XXII. PART III. 7B 
