The book The Principles of Biology was written by author Herbert Spencer Here you can read free online of The Principles of Biology book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Principles of Biology a good or bad book?
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It would be analogous to the process by which, from a mixed solution of salts, there are deposited segregated masses of these salts, in the shape of difierent crystals. But as already said (§ 54), though the selective assimilation by which the repair of organs is efiected, no doubt results in part from an action of this kind, which is consequent on the persistence of force [First Principles, § 129), the facts cannot be thus wholly accounted for ; since organs are in part made up of units that d...o not exist as such in the circulating fluida. The pro- cess becomes comprehensible however, if it be shown that, as suggested in § 54, groups of compound units have a certain power of moulding adjacent fit materials into units of their own form. Let us see whether there is not reason to think Buch a power exists. " The poison of small-pox or of scarlatina," remarks Mr. Paget, "being once added to the blood, presently affects the composition of the whole: the disease pursues its course, 178 THE INDTJCTIONS OF BIOLOGY.
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