The Power That Preserves | My Web Site Page 130 Chapter 01 Page 03

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Dorothea seized this as a precious permission. She would not have asked Mr. Casaubon at once to teach her the languages, dreading of all things to be tiresome instead of helpful; but it was not entirely out of devotion to her future husband that she wished to know Latin and Creek. Those provinces of masculine knowledge seemed to her a standing-ground from which all truth could be seen more truly. As it was, she constantly doubted her own conclusions, because she felt her own ignorance: how could she be confident that one-roomed cottages were not for the glory of God, when men who knew the classics appeared to conciliate indifference to the cottages with zeal for the glory? Perhaps even Hebrew might be necessary--at least the alphabet and a few roots--in order to arrive at the core of things, and judge soundly on the social duties of the Christian. And she had not reached that point of renunciation at which she would have been satisfied with having a wise husband: she wished, poor child, to be wise herself. Miss Brooke was certainly very naive with all her alleged cleverness. Celia, whose mind had never been thought too powerful, saw the emptiness of other people's pretensions much more readily. To have in general but little feeling, seems to be the only security against feeling too much on any particular occasion.

In _dry assays_ the metal is almost always separated and weighed as metal; in _wet_ gravimetric assays the metal is more usually weighed in the form of a definite compound of known composition. The general methods of working resemble those of ordinary chemical analysis, and their successful working is greatly helped by a knowledge of, at any rate, those compounds of the metal which enable it to be separated, and of those which are the most convenient forms in which it can be weighed. But the work of the assayer differs from that of the analyst, inasmuch as the bulk of his estimations are made upon material of practically the same kind, varying only in richness; consequently in assaying, it is possible (and necessary) to work on such a definite plan as will involve the least amount of labour in weighing and calculating. The assayer connected with mining has generally two classes of material to deal with: those comparatively rich and those comparatively poor. For example, silver in bullion and in ores; copper precipitates or regulus, and copper ores and slags; and "black tin" and tin ores. He is only occasionally called on to assay the intermediate products. It is indispensable that he should have an approximate knowledge of the substance to be determined. With new ores this information is best got by a qualitative testing. Knowing that only certain bodies are present, it is evident that the number of separations can be reduced, and that simple methods can be devised for arriving at the results sought for. The best method is that which involves the least number of separations. The reactions must be sharp and complete, and yet not be liable to error under varying conditions.

The principle of selection solved the riddle as to how what was purposive could conceivably be brought about without the intervention of a directing power, the riddle which animate nature presents to our intelligence at every turn, and in face of which the mind of a Kant could find no way out, for he regarded a solution of it as not to be hoped for. For, even if we were to assume an evolutionary force that is continually transforming the most primitive and the simplest forms of life into ever higher forms, and the homogeneity of primitive times into the infinite variety of the present, we should still be unable to infer from this alone how each of the numberless forms adapted to particular conditions of life should have appeared _precisely at the right moment in the history of the earth_ to which their adaptations were appropriate, and precisely at the proper place in which all the conditions of life to which they were adapted occurred: the humming-birds at the same time as the flowers; the trichina at the same time as the pig; the bark-coloured moth at the same time as the oak, and the wasp-like moth at the same time as the wasp which protects it. Without processes of selection we should be obliged to assume a "pre-established harmony" after the famous Leibnitzian model, by means of which the clock of the evolution of organisms is so regulated as to strike in exact synchronism with that of the history of the earth! All forms of life are strictly adapted to the conditions of their life, and can persist under these conditions alone.

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