Pamphlets on Forestry, Volume 121991 |
From inside the book
Results 1-3 of 60
Page 12
... necessary to sacrifice directness for grade . This sacrifice should not , however , be to the extent of making necessary a series of switchbacks or a long detour when a little steeper grade would materially shorten the distance . This ...
... necessary to sacrifice directness for grade . This sacrifice should not , however , be to the extent of making necessary a series of switchbacks or a long detour when a little steeper grade would materially shorten the distance . This ...
Page 40
... necessary to the continued use of trees . Poles should ordinarily be used to make crossings of this kind . When not more than six or seven poles are necessary , they should be considered as trees , and the line wire attached to each by ...
... necessary to the continued use of trees . Poles should ordinarily be used to make crossings of this kind . When not more than six or seven poles are necessary , they should be considered as trees , and the line wire attached to each by ...
Page 73
... necessary : One 47 - A repeating coil , two double - pole , double - throw , baby knife switches , and one telephone set . This method ( fig . 42 ) is used where connection is necessary with some commercial telephone company's toll line ...
... necessary : One 47 - A repeating coil , two double - pole , double - throw , baby knife switches , and one telephone set . This method ( fig . 42 ) is used where connection is necessary with some commercial telephone company's toll line ...
Contents
Object of the publication | 9 |
Description of the different lines of investigationContinued | 12 |
Wood distillation | 25 |
78 other sections not shown
Common terms and phrases
acres amount annual appraisals average bark brush burning capital cent cooperation cost cover creosote crop Department of Agriculture depreciation determine diameter district Division of Forestry Douglas fir effect Engelmann spruce equipment Experiment Station farm farmers fibers fixed investments forage forest land forest reserves Forest Service Fort Bayard furnish germination grade grazing ground growth important improvements inches investigations investment loblolly pine lodgepole pine longleaf pine lookout lumber material ment methods miles mill moisture mountain National Forests operation owners patrol piling plantations planting poles practical present profit protection railroad range rangers red spruce region reproduction season secure seedlings sheep silvicultural slope soil sowing spark arresters species spring spruce streams studies stumpage sugar pine supply Telephone Company thousand feet timber tion trail trees warden white fir white pine wood lot yellow pine