"A SUN IN FLAMES."
[TO TH1 EDITOR OF THE"SPECTATOR."]
Sin,—From a letter in last week's Spectator, signed "A. H. B.," and entitled "A Sun in Flames," I extract the following :— " If a 'day' (meaning an era) of such excessive heat may in the far future be reasonably anticipated, surely we may as ration- ally assume that the like has occurred in the distant past ; and if so, I sOmit that this presents a more probable solution of the problem created by the former existence of sub-tropical life in the circumpolar regions than either astronomy or geology has hitherto supplied."
It is now, I believe, an established fact that our earth has been in a state of cooling from the beginning, from which it is evident that the circumpolar regions must at one time have endured the heat of the tropics, and the tropics a heat correspondingly greater than at the present day. Would not this be a more reasonable way of accounting for sub-tropical life in the circumpolar regions than that which your correspondent suggests ?—I am, Sir, &c., 71 Cromwell Street, Nottingham. H. J. GILBERT.
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