Page 3 Advertisements Column 3

Hawke's Bay Herald-Tribune, Issue 97, 11 May 1937, Page 3

i The earth is built like an onion, witfi three distinct layers, aceording to Dr. II. L. Adams, of tfio Gcopliysical Laborutory of tfie Caruegie Institute of Washington. At tfie centre is tho core, which accoijnLs -for ubout half tho diaineter of the earth. Little is known of.it, Jt will bo umler a constant pressure of 3,200,000 atniospheres, or 47,000,000 lb. to the square inch. While it is probably coniposed of iron, with a small percentage of nickol, it is at a temperature estimated, at 3000 deg. centigrade (5432 Fahrenhoit), and is not raagnetie. Around the core is an intermediate zone about 2000 miles in t.hickness, surrounding which' is the gigantic shell or crust. There is no liquid ma-ss of molten rock under the crust, as was formerlyk believed to be tfie case, said Dr. Adams.