Journal of forestry . 83 60 517 235 830 FOUR-YEAR AVERAGE. Section Area Fires Rate Population Berkshire Hills Connecticut Cod 1,222,000380,750 1,341,300367,300 2,188,000 43 72 314 84 1,176 418232353 83517235 60 Eastern 830 DETERMINING THE HEIGHT OF A LOOKOUT TOWER By Ward Shepard Forest Examiner, U. S. Forest Seriice How high a lookout tower should l;e is as difficult to answer as theancient question, How old is Ann? Like Anns age, it may be decep-tive and a blunder may lead to unpleasantness. A tower may be builtthat is ineffective because too low or needless
Journal of forestry . 83 60 517 235 830 FOUR-YEAR AVERAGE. Section Area Fires Rate Population Berkshire Hills Connecticut Cod 1,222,000380,750 1,341,300367,300 2,188,000 43 72 314 84 1,176 418232353 83517235 60 Eastern 830 DETERMINING THE HEIGHT OF A LOOKOUT TOWER By Ward Shepard Forest Examiner, U. S. Forest Seriice How high a lookout tower should l;e is as difficult to answer as theancient question, How old is Ann? Like Anns age, it may be decep-tive and a blunder may lead to unpleasantness. A tower may be builtthat is ineffective because too low or needlessly expensive because toohigh. The following described method was used to find the height of aproposed tower on Mt. Taylor on the Manzano National Forest. Ido not know whether the method is new, but have never seen it usedor described. Distance in Fee+c 50 (oo 150 aoo 250 300 350 -^--o^^ ^~~-^^~-^_. Fig. 1. The view northwest of Taylor Peak is cut off by a stand of Engel-man spruce extending nearly to the top of the peak and reducing thearea of visibility by about one-third. As a consequence, the lookout-man has been required to ride about two miles northwest to MoscaPeak in order to see the country invisible from Mt. Taylor. The problem then was to determine how high a tower was neededto look over this timber. Levels were run with an Abney hand levelfrom the summit of Taylor Peak down through the highest fringe of 767 768 JOURNAI. OF FORESTRY timber, one traverse going through the left edge and one through theright edge of this fringe. The heights and positions of the tallest treesalong the lines of these levels were determined. These heights canbe easily determined by measuring 100 feet from the base of the tree,on level ground, and sighting at the top of the tree with the hand-level,the height being expressed in feet by the reading in per cent. To thisis added the height of th
Size: 1958px × 1276px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectforestsandforestry
