"There are moist, mild, cloudy days of Spring and early Summer, that rejoice the heart of the farmer, for he knows how conducive they are to the young growth on his fields. The coal measure climate would have consisted of an unbroken series of these, with, mayhap, a little more of cloud and moisture and a great deal more of heat. The earth would have been a vast greenhouse covered with smoked glass, and a vigorous, though, perhaps, a loosely-knit and faintly-colored, vegetation would have luxuriated under its shade. That the vegetable growth must have been great we can easily imagine when we consider the immense quantities of coal throughout the world. It is a remarkable circumstance that, from the equatorial regions up to Melville Island in the Arctic Ocean, where continual frost now prevails; and from Spitzbergen to the center of Africa, the remains of the plants of the coal measures are identically the same. There seems to have been then only one climate over the whole globe, caused, no doubt, by the internal heat of the earth. We should not forget that Moses puts the elevating of the land and the production of vegetation in the same geological period, viz., between the second and third day." "And the evening and the morning were the third day." (_Gen. i_, 13.) Before this time there seems to have been no seasons; but, after that, God appointed the sun, moon and stars "to give light upon the earth, and to be for signs, and for seasons, and for days and for years." That the sun and stars had been created long before this, we have no reason to doubt. We may, therefore, correctly infer that they were then, for the first time, visible from the surface of the earth. {185} [TRANSCRIBER'S NOTE: Here is an artist's rendition of a primordial forest] {186} CHAPTER XII. HARMONY OF GENESIS AND GEOLOGY. DEVELOPMENT OF SPECIES--SURVIVAL OF THE FITTEST--LAWS OF VARIATION--GRADUAL EXTINCTION OF ANIMALS--AQUATIC CHARACTER OF EARLIEST BIRDS--INDICATIONS OF LIFE IN CHALK--PRIMEVAL MONSTERS--HUGE LAND ANIMALS--CHANGE IN THE CLIMATE OF THE EARTH--CREATION OF MAN--NO INTERMEDIATE LINK. Philosophers lay it down as a rule, that the materials for all revolutions, whether political, moral or social are prepared before-hand. A revolution in ideas and modes of thought is by no means an exception to this rule. The unthinking throng may gaze in wonder at the spectacle afforded by the sudden outburst; but the thoughtful student will trace the order of events, and the forces that have been long at work preparing the minds of men for the new order of things.