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Articles 11791 - 11812 of 11812
Full-Text Articles in Life Sciences
The Story Of Aspen, Enos Mills
Further Studies In The Ecotone Between Prairie And Woodland, R. J. Pool, J. E. Weaver, F. C. Jean
Further Studies In The Ecotone Between Prairie And Woodland, R. J. Pool, J. E. Weaver, F. C. Jean
Papers from the University Studies series (University of Nebraska)
A series of intensive investigations of the ecological features of the tension zone between prairie and woodland in the Mississippi valley was begun by Weaver and Thiel in 1915. These studies were continued for two seasons in Minnesota and were also extended to the prairies of eastern Nebraska in 1916. These investigations represent the first attempt to attack the prairie-forest problem on a comprehensive scale by means of the quantitative methods of modern ecology. Some of the results secured from these studies have been published as the first paper of a series planned to deal with critical investigations in the …
A Study Of The Vegetation Of Southeastern Washington And Adjacent Idaho, J. E. Weaver
A Study Of The Vegetation Of Southeastern Washington And Adjacent Idaho, J. E. Weaver
Papers from the University Studies series (University of Nebraska)
Noone at all botanically inclined can travel through southeastern Washington without being impressed with the marked changes which a distance of only a few miles may show in the vegetation. Traveling eastward from a point fifty miles west of the Idaho state line, one passes from a region of scab-land sagebrush through one of rolling hills covered with bunch-grasses. Upon steadily ascending the great Columbia Plateau, the 'bunchgrasses give way to well developed prairies, and these in turn, near the Idaho line, to forests of yellow pine, Douglas fir, white fir, tamarack, and cedar. Or starting from Spokane in the …
Aspen As A Permanent Forest Type, James M. Fetherolf
Aspen As A Permanent Forest Type, James M. Fetherolf
Aspen Bibliography
In an article on the "Stability of Aspen as a Type," published in the January, 1916, issue of the Proceedings of the Society, the author seems to infer that all aspen is temporary as a type, but refers to the prevalence of a different view in District 4 from that held by himself. In presenting this other view, I intend to bring out the more permanent features of aspen as a type. The importance of a clear understanding regarding this from the management and forestation standpoints is admittedly great. Any information that may be supplied or stimulus added to research …
The Keene Forest: A Preliminary Report, J. W. Toumey, Ralph C. Hawley
The Keene Forest: A Preliminary Report, J. W. Toumey, Ralph C. Hawley
Yale School of the Environment Bulletin Series
In 1913 the Yale School of Forestry came into possession of certain parcels of land located near Keene, New Hampshire. This land amounting to 629.4 acres was presented to the School as a nucleus for a school forest to be used for purposes of instruction and research. Subsequently in March, 1915, additional lots comprising 270.9 acres were purchased with funds contributed by the original donor. The present area totals 900.3 acres and is know as the "Keene Forest."
Ecological Investigations Upon The Germination And Early Growth Of Forest Trees, Richard H. Boerker
Ecological Investigations Upon The Germination And Early Growth Of Forest Trees, Richard H. Boerker
Papers from the University Studies series (University of Nebraska)
Briefly stated the purpose of the present investigation is to inquire into the effect of the more important habitat and seed factors upon the germination and early development of certain American forest trees in control cultures in the greenhouse for the purpose of obtaining data that may be used in the ~ilvicultural management of these species.
Prefatory Note 1 / Preliminary Considerations 7 / Historical 7 / Classification and Resume of Habitat Factors 11 / The Germination Process 15 / Method of Attacking Problem at Hand 19/ Methods and Apparatus Used 2 1/ The Control of Habitat Factors 24 / …
The Stability Of Aspen As A Type, Arthur W. Sampson
The Stability Of Aspen As A Type, Arthur W. Sampson
Aspen Bibliography
No abstract provided.
Effects Of Varying Certain Cooking Conditions In Producing Soda Pulp From Aspen, Henry E. Surface
Effects Of Varying Certain Cooking Conditions In Producing Soda Pulp From Aspen, Henry E. Surface
Aspen Bibliography
No abstract provided.
A Working Plan For The Woodlands Of The New Haven Water Company; Prepared After Five Years Of Forest Practice, 1908 To 1912, Ralph C. Hawley
A Working Plan For The Woodlands Of The New Haven Water Company; Prepared After Five Years Of Forest Practice, 1908 To 1912, Ralph C. Hawley
Yale School of the Environment Bulletin Series
Soon after the establishment of the Yale Forest School in 1900, the necessity developed for finding forest lands near the city of NewHaven upon which to conduct field work. It was found that many of the most accessible and best timbered tracts were owned by the New Haven Water Company....about 250 acres near the Maltby Lakes were placed under the management of the Yale Forest School. ...a written plan is desirable. The plan is divided into two parts: the first, descriptive of present conditions and passt accomplishments; the second, treating of the policy to be pursued.
Prolonging The Cut Of Southern Pine Part I. Possibilities Of A Second Cut; Part Ii. Close Utilization Of Timber, Herman H. Chapman, Ralph C. Bryant
Prolonging The Cut Of Southern Pine Part I. Possibilities Of A Second Cut; Part Ii. Close Utilization Of Timber, Herman H. Chapman, Ralph C. Bryant
Yale School of the Environment Bulletin Series
Part I - Since 1907 the Yale Forest School has conducted the field workand instruction of the Senior class in the spring term in coopera-tion with lumber companies located in the southern states. Thecompanies which have extended this cooperation are:
1907, Missouri Lumber and Mining Co., Grandin, Missouri.1908, Kaul Lumber Co., Hollins, Alabama.1909, Thompson Brothers Lumber Co., Doucette, Texas.1910, Louisiana Central Lumber Co., Clarks, Louisiana.1911, Thompson Brothers Lumber Co., Trinity, Texas.
191~, Crossett Lumber Co., Crossett, Arkansas.
Part II - The lack of close utilization of yellow pine timber is apparenton many operations in the South. In the following discussionsome …
Thesis On Log Haulers, Vaughan Jones
Thesis On Log Haulers, Vaughan Jones
Maine History Documents
It has always been the aim of man to procure some new and more efficient means of doing a certain work. This holds as true in lumbering as in anything else; though perhaps no branch of the very important industry of obtaining a manufacturing lumber has received less attention than the cutting and hauling of the raw material.
A Classification For Forestry Literature, Faculty Of The Yale Forest School
A Classification For Forestry Literature, Faculty Of The Yale Forest School
Yale School of the Environment Bulletin Series
The following classification for forestry literature has been prepared by the Faculty of the Yale Forest School for use in its library. It is published to supply the demand for a simple and comprehensive classification that is adapted to any library system. The work was begun about one year ago and included a study of all available data on the subject. A tentative outline was submitted to prominent members of the profession from whom helpful suggestions were received.
The subject has been divided into nine parts of approximately equal importance. The secondary divisions also have been limited to nine and …
The Aspens: Their Growth And Management, William Grant Weigle, Earl Hazeltine Frothingham
The Aspens: Their Growth And Management, William Grant Weigle, Earl Hazeltine Frothingham
Aspen Bibliography
The aspens, or "popple," as they are often collectively termed, occupy a peculiar position in the forests of North America. Growing up rapidly and in great abundance over areas which have been deforested, usually by fire, they attain only a small size, produce a soft, weak wood, extremely valuable for a limited number of uses, and die at a relatively early age.
Conservation Of The Future Lumber Supply, T. B. Walker
Conservation Of The Future Lumber Supply, T. B. Walker
Journal of the Minnesota Academy of Science
No abstract provided.
Fearsome Creatures Of The Lumberwoods: With A Few Desert And Mountain Beasts, William T. Cox, Coert Du Bois
Fearsome Creatures Of The Lumberwoods: With A Few Desert And Mountain Beasts, William T. Cox, Coert Du Bois
Nebraskiana Publications
Every lumber region has its lore. Thrilling tales of adventure are told in camp wherever the logger has entered the wilderness. The lumber jack is an imaginative being, and a story loses none of its interest as it is carried and repeated from one camp to another. Stories which I know to have originated on the Penobscot and the Kennebec are told, somewhat strengthened and improved, in the redwood camps of Humboldt Bay. Yarns originating among the river drivers of the Ottawa, the St. Croix, and the upper Mississippi are respun to groups of listening loggers on Vancouver Island. But …
Practical Information On The Scolytid Beetles On North American Forests I. Barkbeetles Of The Genus Dendroctonus, Andrew Delmar Hopkins
Practical Information On The Scolytid Beetles On North American Forests I. Barkbeetles Of The Genus Dendroctonus, Andrew Delmar Hopkins
The Bark Beetles, Fuels, and Fire Bibliography
During the writer's investigations of extensive insect depredations in the forests of West Virginia, from 1890 to 1902, he was forcibly impressed with the importance of the forest-insect problem in connection with any future efforts toward the successful management of the forests of this country, and was thus led to give special attention to the subject. It was soon realized that among the principal groups of insect enemies of forest trees the scolytid bark and wood boring beetles must occupy first rank, both in economic importance and systematic interest. Subsequent investigations in West Virginia, in connection with the work of …
What Forestry Has Done., Treadwell Cleaveland Jr.
What Forestry Has Done., Treadwell Cleaveland Jr.
USDA Forest Service / UNL Faculty Publications
Many people in this country think that forestry had never been tried until the Government began to practice it upon the National Forests. Yet forestry is practiced by every civilized country in the world, except China and Turkey. It gets results which can be got in no other way, and which are necessary to the general welfare. Forestry is not a new thing. It was discussed two thousand years ago, and it has been studied and applied with increasing thoroughness ever since.
The principles of forestry are everywhere the same. They rest on natural laws, which are at work everywhere …
Plant Migration Studies: Forest Trees, Charles E. Bessey
Plant Migration Studies: Forest Trees, Charles E. Bessey
Papers from the University Studies series (University of Nebraska)
It is a familiar fact that new species appear from time to time among the native plants of a region. Such newcomers turn out on examination to be new only in the sense that they have not previously lived in the region, and in every instance these new plants are found to have come from other regions where they had existed for a longer or shorter period of time. In some cases the · new species remain for a time and then disappear, or at least become inconspicuous, but more commonly they crowd in among the former plants and become …
The Distribution Of The Native Forest Trees Of Nebraska, Charles E. Bessey, Robert Bolin , Depositor
The Distribution Of The Native Forest Trees Of Nebraska, Charles E. Bessey, Robert Bolin , Depositor
School of Biological Sciences: Faculty Publications
This document lists 67 trees identified by Dr Bessey with the help of others around the state. It includes the common and scientific names as well brief comment about each tree. Small maps are provided showing the distribution of each tree.
Notes On The Forest Region Of Northern Idaho, John B. Leiberg
Notes On The Forest Region Of Northern Idaho, John B. Leiberg
Journal of the Minnesota Academy of Science
No abstract provided.
The Utilization Of Sawdust, James A. Dodge
The Utilization Of Sawdust, James A. Dodge
Journal of the Minnesota Academy of Science
No abstract provided.
A Comparison Of The Deinkability Of Certain Printing Inks, Jacob Van Giessen
A Comparison Of The Deinkability Of Certain Printing Inks, Jacob Van Giessen
Paper Engineering Senior Theses
Printing inks differ in their composition and in their ability to be removed from paper in the deinking process. I was the purpose of this research work to make a comparison of this deinkability, for common printing inks.
In this experimentation, five inks were compared. These were a linseed oil base ink, a mineral oil base ink, a moisture set ink, a alkyd base in and a rubber base ink. Deinking was done using a standard deinking formula and varying only the concentration of the deinking agent.
The results show a marked difference in concentrations of deinking agent necessary for …