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He was thinking that there was even more of an official fossilisation of Sir Rupert's earlier nature than Sir Rupert himself had suspected or described. Hamilton assumed that it was all the natural sort of thing that everybody in office became like that in time.
Earlier critics of evolution used, when they were imperfectly acquainted with the conditions of fossilisation, to insinuate that this fragmentary nature of the geological record was a very convenient refuge for the evolutionist who was pressed for positive evidence. The complaint is no longer found in any serious work.
To return to the general argument pursued in this chapter, it is assumed, for reasons above explained, that a slow change of species is in simultaneous operation everywhere throughout the habitable surface of sea and land; whereas the fossilisation of plants and animals is confined to those areas where new strata are produced.
This quaint ceremonial, still annually observed in the secluded capital of Buddhism the Rome of Asia is interesting because it exhibits, in a clearly marked religious stratification, a series of divine redeemers themselves redeemed, of vicarious sacrifices vicariously atoned for, of gods undergoing a process of fossilisation, who, while they retain the privileges, have disburdened themselves of the pains and penalties of divinity.
The perplexity in which we are involved when we attempt to solve this problem may be owing partly to our want of diligence as collectors, but still more perhaps to ignorance of the laws which govern the fossilisation of land-animals, whether of high or low degree. On green shale, from Cape Breton, Nova Scotia. Natural size.
Not only does this process of imbedding and fossilisation occur with marine and other aquatic animals and plants, but it affects those land animals and plants which are drifted away to sea, or become buried in bogs or morasses; and the animals which have been trodden down by their fellows and crushed in the mud at the river's bank, as the herd have come to drink.
What we now know to be the results of the chemical changes which take place in the course of fossilisation, by which mineral is substituted for organic substance, might, in the absence of such knowledge, be fairly interpreted as the expression of a process of development in the opposite direction from the mineral to the organic.
These different forms of fossilisation may easily be understood if we examine the mud recently thrown out from a pond or canal in which there are shells. If the mud be argillaceous, it acquires consistency on drying, and on breaking open a portion of it we find that each shell has left impressions of its external form.
In some periods faith is glorified; in others, doubt. In these days, it might be thought from much we hear, a little scepticism is the one sure evidence of intellectuality; while steadfastness in the creed of one's youth proves the possession of a dull and narrow mind and the existence of that hopeless mental condition known as fossilisation.
The ontogenetic facts that we gather from this sole survivor of the Acrania are the more valuable for phylogenetic purposes, as paleontology, unfortunately, throws no light whatever on the origin of the Vertebrates. Their invertebrate ancestors were soft organisms without skeleton, and thus incapable of fossilisation, as is still the case with the lowest vertebrates the Acrania and Cyclostoma.
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