Progressive Art Studies; Light and Shade, and Landscape

Progressive Art Studies; Light and Shade, and Landscape

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1883 edition. Excerpt: ...of this rock is tough hardness, not brittle hardness, like that of glass or flint, which will splinter violently at a blow in all directions. This is estimated to be the oldest kind of rock, as the age of these bodies is for the most part proximately indicated by their degree of hardness. Indeed, its compactness is so great that even long exposure to the wearing forces of water, heat, and frost have but little effect on its contours; which makes it useful in the construction of large buildings where durability is an essential requisite. Limestone is composed of hardened calcareous matter, sometimes mixed with more or less sand, and, as it forms the greater part of low hills and uplands, it is one of the most usual forms of foreground rock. Its varieties supply us with the most valuable materials for building and sculpture. Among these are the marbles, the uses of which for carvings and works of architectural beauty are too well known to refer to. As its forms, while exceedingly dense and solid in substance, are quite susceptible to the effects of the elements, it presents greater variety of form and color than most rocks. Another class of rocks, called sandstone or freestone, is merely hardened sand, at times closely cemented into quite compact masses, and at others so incoherent as to hardly deserve the name of rock. There are other tolerably hard rocks that separate in plates, owing to layers of mica and loose matter. This arrangement of layers of mica, etc., causes this sort of rock to break into flattish fragments, and, in the bulk, their stratification is so marked that the artist has more opportunity of showing their structure than in most other rocks, and their contours can therefore be rendered with greater ease. It may be remarked that...show more

Product details

  • Paperback | 30 pages
  • 189 x 246 x 2mm | 73g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236616669
  • 9781236616661