পাতা:জীবন (কৃষ্ণপদ বিদ্যারত্ন).djvu/২০

[ R ] of the gases or vapours of many elements whieh we know well and which can be found in our own bodies—hydrogen, lime, magnesium (which gives such a bright light when it is burnt ), sodium, and iron ; and besides iron a large number of other metals well-known on the earth. (The marvel of the sun's great power in all our daily lives ). We know that he is what he has been since life first appeared on earth, and what he must continue to be so long as life remains on earth, —the great source of the power which, mainly in the form of light and heat, and also in other ways which we are only beginning to understand, sustains all life, makes the rain and the rivers, gives every visible part of the earth its light and colour snd beauty, supplies the food of the green plants upon which we feed, and so works in our muscles every time we move, in the eyes which see the beauty of the earth and of the sun itself, and in the brains by means of which we try to learn how all these things came to be." ( Book of Knowlege VII & VIII Vols.) “We could not live without the sun and we cannot know too much about it.” ( I-II Vol.s ) ভাবার্থ,—( সৰ্ব্বদা সূৰ্য্য হইতে বিদ্যুতের উপাদান ইলেক