. Michigan manual of forestry ;. Forests and forestry. rOREST DIVISION 39 comings of the preliminary survey, as stated above. Since the mapping and description work is done in detail, this method is a combination of extensive and intensive work, with doubtful justi- fication.*. Figure i. Primary and Secondary "Control" or base-lines. Line I, 2, 3, 4 is here th« principal line, a, b, c are secondary lines. Dotted lines m, n, and o are lines of travel of the crew estimating and describing the timber. At I is a Section Corner, here used to "tie ; b. Use and Value of Subdivi
. Michigan manual of forestry ;. Forests and forestry. rOREST DIVISION 39 comings of the preliminary survey, as stated above. Since the mapping and description work is done in detail, this method is a combination of extensive and intensive work, with doubtful justi- fication.*. Figure i. Primary and Secondary "Control" or base-lines. Line I, 2, 3, 4 is here th« principal line, a, b, c are secondary lines. Dotted lines m, n, and o are lines of travel of the crew estimating and describing the timber. At I is a Section Corner, here used to "tie ; b. Use and Value of Subdivision in Forestry. The value of a good permanent subdivision on the ground not only in Survey or examination of the property, but also in Utiliza- tion, Protection, Silviculture and even in Improvements, but most of all in proper Administration and Bookkeeping, is very great. It was fully appreciated by Cotta a hundred years ago, and Martin * These 'base- or control-lines may be established by a crew of four men; transitman, recorder, rodman, and axman (changes in this to suit timber, etc.). This crew in fair country can do two miles per day at an expense of about $ per mile. Stations usually every ten chains, with number and altitude. This crew maps along line; measurement by Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Roth, Filibert, 1858-1925. Ann Arbor, Mich. : Filibert Roth
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectforestsandforestry
