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Gallegallo Revbrandia Sectory 12
Page 08
Crossing the solar spectrum are hundreds and hundreds of dark lines. These could not at first be explained, because this fact of discriminative absorption was not known. We understand now. The sun's white light comes from the photosphere, but between us and the photosphere there is, as we have seen, another solar envelope of relatively cooler vapours--the reversing layer. Each constituent element in this outer envelope stops its own kind of light, that is, the kind of light made by incandescent atoms of the same element in the photosphere. The "stoppages" register themselves in the solar spectrum as dark lines placed exactly where the corresponding bright lines would have been. The explanation once attained, dark lines became as significant as bright lines. The secret of the sun's composition was out. We have found practically every element in the sun that we know to be in the earth. We have identified an element in the sun before we were able to isolate it on the earth. We have been able even to point to the coolest places on the sun, the centres of sun-spots, where alone the temperature seems to have fallen sufficiently low to allow chemical compounds to form.
The written symbol extends infinitely, as regards time and space, the range within which one mind can communicate with another; it gives the writer's mind a life limited by the duration of ink, paper, and readers, as against that of his flesh and blood body. On the other hand, it takes longer to learn the rules so as to be able to apply them with ease and security, and even then they cannot be applied so quickly and easily as those attaching to spoken symbols. Moreover, the spoken symbol admits of a hundred quick and subtle adjuncts by way of action, tone and expression, so that no one will use written symbols unless either for the special advantages of permanence and travelling power, or because he is incapacitated from using spoken ones. This, however, is hardly to the point; the point is that these two conventional combinations of symbols, that are as unlike one another as the Hallelujah Chorus is to St. Paul's Cathedral, are the one as much language as the other; and we therefore inquire what this very patent fact reveals to us about the more essential characteristics of language itself. What is the common bond that unites these two classes of symbols that seem at first sight to have nothing in common, and makes the one raise the idea of language in our minds as readily as the other? The bond lies in the fact that both are a set of conventional tokens or symbols, agreed upon between the parties to whom they appeal as being attached invariably to the same ideas, and because they are being made as a means of communion between one mind and another,-for a memorandum made for a person's own later use is nothing but a communication from an earlier mind to a later and modified one; it is therefore in reality a communication from one mind to another as much as though it had been addressed to another person.
How curious is the structure of the nest of the Bullfinch or Chaffinch! The inside of it is lined with cotton and fine silken threads; and the outside cannot be sufficiently admired, though it is composed only of various kinds of fine moss. The color of these mosses, resembling that of the bark of the tree in which the nest is built, proves that the bird intended it should not be easily discovered. In some nests, hair, wool, and rushes are cleverly interwoven. In others, the parts are firmly fastened by a thread, which the bird makes of hemp, wool, hair, or, more commonly, of spiders' webs. Other birds--as, for instance, the blackbird and the lapwing--after they have constructed their nests, plaster the inside with mortar; they then stick upon it, while quite wet, some wool or moss to give warmth; but all alike construct their nests so as to add to their security.
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