136 
[March, 
The Heat of the Sun. 
^ *&A SS would K”I 
SUter would’ remain in space. In space, there ore there 
would be a vast preponderance of hydrogen and the lighter 
hydrocarbons. But, again, the planetary system as a who^ 
will attract the rarefied gases existing in stellar space, thu 
cViqII have existing in space what may be called tn 
dasse^of^atmospheres, — inter-stellar, inter* planetary, and 
classes 01 v wi u vary in density, the first 
according to the distances of the stars, the second according 
ti the miss of the particular system as a whole the third 
according to Ihe mats of the attrafting planet In support 
of this view the molecular theory of gases is brou^ t , 
the evidence afforded by the analyses of gases occluded by 
meteorolites which have fallen upon the Earth andto 
teachings of spedtrum analysis. Each ol tn 
a perfectly sound and practically unanswerable argument 
favour of the existence of a universal atmosphere. 
In regard to the idea that if such atmospheres did exist 
the central body of each system would attract to itself t le 
heavier eases whereas the revelations of spectrum analysis 
Show a prevalence of hydrogen, Dr. Siemens remarks that 
ft C an be shown that at such a temperature as the Sun 
sphere there must be^reg^ ^ certain counte , balancing 
SI" This counterbalancing aftion is 1 provided 1 for by 
an equatorial nse of the solar tmos P ^ ^ hej M f 
ST ^ nL P cffit 
h* wever ° vitiated by his assumption of the emptiness of 
steTlar Inale If we suppose this aflion to go on m a me- 
stellar space. ■ exercised upon that medium, 
dlUn ?tini ^n a movement outwards at the Equator and a 
resulting in a m The Sun therefore, upon 
to hypothesiris supposed to have around his Equator a 
