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Leonardo da Vinci

  • b0985772811цитируетв прошлом году
    Thou, O God, sellest us all benefits, at the cost of our toil.... As a day well spent makes sleep seem pleasant, so a life well employed makes death pleasant. A life well spent is long."
  • b0985772811цитируетв прошлом году
    "the painter strives and competes with nature,"
  • b6464997412цитирует2 года назад
    inward purpose and outward expression
  • b6464997412цитирует2 года назад
    "There is nothing in all nature without its reason," he wrote. "If you know the reason, you do not need the experience."
  • ann karagwaцитирует2 года назад
    A keen desire for knowledge, guiding his action in life, spurred him onward.
  • lhernandexцитирует2 месяца назад
    IN PRAISE OF THE SUN.

    If you look at the stars, cutting off the rays (as may be done by looking through a very small hole made with the extreme point of a very fine needle, placed so as almost to touch the eye), you will see those stars so minute that it would seem as though nothing could be smaller; it is in fact their great distance which is the reason of their diminution, for many of them are very many times larger than the star which is the earth with water. Now reflect what this our star must look like at such a distance, and then consider how many stars might be added—both in longitude and latitude—between those stars which are scattered over the darkened sky. But I cannot forbear to condemn many of the ancients, who said that the sun was no larger than it appears; among these was Epicurus, and I believe that he founded his reason on the effects of a light placed in our atmosphere equidistant from the centre of the earth. Any one looking at it never sees it diminished in size at whatever distance; and the rea-

    [Footnote 879-882: What Leonardo says of Epicurus— who according to LEWIS, The Astronomy of the ancients, and MADLER, Geschichte der Himmelskunde, did not devote much attention to the study of celestial
  • lhernandexцитирует2 месяца назад
    If you want to prove why the moon appears larger than it is, when it reaches the horizon; take a lens which is highly convex on one surface and concave on the opposite, and place the concave side next the eye, and look at the object beyond the convex surface; by this means you will have produced an exact imitation of the atmosphere included beneath the sphere of fire and outside that of water; for this atmosphere is concave on the side next the earth, and convex towards the fire.
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