Field, laboratory, and library manual in physical geography . 105 Long-it ude 100. CONTOUR LINES 99 EXERCISE XXIX CONTOUR LINES Part I Shape a sand hill on the table so that you will have a ridgeextending in one direction from the summit, and one or moresmall streams flowing down the sides. Place a block one inchthick on the table and lay a long straight pointer on top of the block and pointer so that the end of the pointer willjust touch and make a mark on the side of the hill. Move theblock and pointer around so that a continuous line will betraced. This is a contour line. Place anot
Field, laboratory, and library manual in physical geography . 105 Long-it ude 100. CONTOUR LINES 99 EXERCISE XXIX CONTOUR LINES Part I Shape a sand hill on the table so that you will have a ridgeextending in one direction from the summit, and one or moresmall streams flowing down the sides. Place a block one inchthick on the table and lay a long straight pointer on top of the block and pointer so that the end of the pointer willjust touch and make a mark on the side of the hill. Move theblock and pointer around so that a continuous line will betraced. This is a contour line. Place another block under thefirst, so that the pointer will be two inches from the top ofthe table, and trace another line around the hill. Repeat theprocess, adding one block at a time, until the top of the hillis reached. Draw a map of the surface as you would see it looking fromabove. Use the scale most convenient. Give your map a title,stating that it was made in the laboratory. Part II Write a paper as follows : Define contour line. A contour interval is the vertical distancebetwee
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