Little Waterfalls Are Harnessed: There is also light industry: footwear in the Basque country; Textiles in Guipuzcoa, Catalonia, Bigorre region, and Ariege; and paper in Cata¬lonia, Guipuzcoa, and the valleys of the Salat and Garonne.
Industries depend more and more on elec¬tricity ; big and little waterfalls are harnessed on both sides of the Pyrenees, especially on the central French slopes, in Catalonia, and in the Spanish Basque country. Altogether the developed power amounts to 2,800,000 kilowatts, part of which is exported, especially over the French net¬work. Natural gas is found in the French pied¬mont, and allied to it at Lacq is an enormous sulfur production.
To these activities should be added tourism, winter sports, and numerous well-known watering places, some as Ax-les Thermes, Luchon, and Cauterets, frequented since antiquity. Their con¬tribution would be greater were there better means of access. Except at the ends of the Pyrenees only two railroads traverse the chain, one under the Somport, the other under the Col de Puymorens; but others have been planned. The region as a whole would be more fully developed if the Pyrenees did not separate France and Spain at the frontiers by their height, compactness, and their peripheral location. They are still underdeveloped and rural life is often archaic.
Madeiran scenery is spiced by a feature unique to this island, namely, its levadas, or water courses, which are harnessed in the lofty mountains (Pico Ruivo is over 6000 feet), in an intricate design of irrigation that waters the lower levels. For dozens of exciting miles, hikers may walk along these levadas, an exercise that affords one of the finest holiday sports on earth.See Also Hardiness Zone:There are eleven hardiness zones, which are defined according to lowest winter temperatures. Zone 1 represents the coldest conditions, with winter temperatures below -50°F (-46°C); zone 11 is the warmest, wit] a minimum winter temperature of above 40°F (above 4°C). The classification of a plant into a particular hardiness zone means that the plant will normally thrive in that zone and also in any zone which is marked with a higher number.
This hardiness zone map will help you measure the degree of cold that a plant can tolerate in your area. The lower number represents the coldest temperature in which the plant can survive and the higher number refers to the warmest temperature in which the plant will thrive. Some plants, such as hardy bulbs, actually need winter chilling and will lose vigor in a warm zone. No zones have been given for annuals because they do not usually live through the winter.
The plants listed in this book carry a hardiness rating. This indicates that it will flower at the average minimum winter temperature that is given for that zone.
On The Other Hand See Zone Centered:Gutenberg found that abnormally low velocities of seismic waves occur in a zone centered at about 62-124 mi (100-200 km) be¬low the surface. In this low-velocity zone the mantle transmits earthquake waves more slowly because it is close to its melting point and therefore less rigid than usual. A few years after this discovery Sir Harold Jeffreys of Cambridge University and K. E. Sullen of Sydney, Austr., discovered that between the depths of 210 and about 380 mi (338 and about 612 km) there is a rapid change in density—a transition zone in which the density suddenly increases by 20%.
From this data he can obtain in his negative any one toni and will know exactly the tones that other subject lumi nances will produce. The infinite gradation of light an< shade found in nature Adams divides into ten zones Zone O is black, Zone IX is white. Between these ex tremes are eight tones of gray, Zone V being the "middle tone—not by objective measurement, but by subjectivi judgment—and next to it, marked VI, the value tha conveys to the photographer the feeling of the tone o average, well-lighted skin.
|
