Show HEAT OF THE SUN there seems to be sun chent reason for tl e belief that alie 1 eit at present emitted from the sun is neither greater nor less than that wl ich our 1 irol nary used to dispense apes ago says coot hard here tl e vine ind the olive now grow tl e vine ai d the olivo twenty centuries back e must not loft ever i lice too strong n reliance on abe deduction from such a fact 1 is us how by natural selection cui preserve its adaptation notwithstanding tl e gradual change of the s wounding conditions ahe facts however fail to show any grounds tor tint tl ero 1 a e been changes in the climates of with times e have geological evidence aa to the chancier of the clinnie which i re availed it a remote antiquity f r e alier than any I 1 istone testimony 1 e fcc of the rocks show us un question ably that our globe h is i assed through many striking vicissitudes of 1 at ai d cold athe records tl it there 1 ave been i d iring chich some of tl e fairest regions of tl 13 globe iv ere desolated by a that they became thickly cased ith solid ce 11 ere am e ilso aten periods en conditions of a i opposite char acter have i revalued 1 i olar regions irp now alie abode of aroi penetrable enet rable ice 1 u e once a succession of long niad de divided by winters remarkably alike for and mildness solitude now so dis mal and so barren then nourished I 1 lants and animals tl at c in only thrive under benial conditions of climate no doubt tho question as to the on gin 0 tl apse gre it climatic elm acs ft inch have so frequently in the co arse 0 geological time presents many is as to aliat tho cause 0 tl aso cli anges may 1 avo been I 1 do not now el tei into this subject for our pur pose it sill onoto import ant conclusion chose ho are competent to an opinion on alio question ot the ci ise of the geological v ir lations of climate are in accord that the cli anges have not been d ie to any actual faiia e supply of heat emitted from the sun in others there is not the slightest reason to belicia tl at the sun itself has been eitnier ai preci ably colder dunns geologic il times th in it is at tl e present moment |