W. A. Norton on Molecular Physics. 77 
the needle an easterly deflection; except near the autumnal 
equinox when their effect upon the declination will be slight. 
For the currents will run from 8. of the magnetic H. to N. of 
change is due to the excess of the N. toS. cu rrents, from the 
summer to the winter solstice, over the S. to N. currents from 
the winter to the summer solstice, Under the influence of these 
currents the needle should be in its most westerly position near 
winter solstice, or near the close of the period during which 
. to S, currents are developed ; and at its most easterly po- 
iiiion near the summer solstice. The observations at these sta- 
tions give results in entire accordance with these theoretical con- 
clusions. But for the influence of the currents at other localities 
‘the amount of the inequality should be equal to the annua 
secular —— This was the case at Toronto (each 2’, in the 
tion mical matter into the nde nese is another source of hea 
2. Similar inferences ith r nepeiic an = 
condit e d proximate estimate away e of the com- 
canic eruptions. 1 Senet is idea there should pro obabir be certain lines of upheava 
Corresponding to ag ae currents, in some of their shifting and pie 8 
Stationary position 
4. The ign. 8 and corks nucleus of a comet should gett magnetized and 
heated in the as the earth, and the sun, both in its mass and photo- 
sphere, In this fa: fact w we aa the apparent origin of the i vactie and de ent 
of successive nebulous ps, and of the emission of luminous jets the nu- 
us ;—the process of detachment and indefinite expulsion being same as 
already to, as in operation in the phot f the earth (p. 76). Th 
Same process attends the formation of the solar spo originates — of ne 
ulous matter, seen in the zodiacal light. The residual cometary phenomena, which re- 
Main unaccounted for by Olbers and Bessel’s Peseel as arenes and amplified by the 
minute dt a Journal, vols. xxvii, xxix, an [2D may raga nga their 
" matter, set from oe sun, into oar earth photo: here, that the ont 
Variations of the aie ie tensi r the earth’s surface, are in 
idea that free at heric electricity, for cate ch no adequa’ ts tavee reetiiel las has 
Yet been ascert , is derived from the auroral matter ghus received. "ink, the 
; diurnal variations of the barometer are other — s that should result, on 
“Mechanical principles, fom the same gene! 
the hourly fall of | the temperature, durkog aha latter 
onic t, fe nfficient meteorological cause can be found, would 
afford di rene nee heating eet tat hs een attributed to the 
