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- Winchell, N. H. (Newton Horace), 1839-1914. (6)
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Articles 31 - 60 of 104
Full-Text Articles in Life Sciences
Direct Impact Of Forest Harvesting In Northeastern Minnesota, Philip L. Friest
Direct Impact Of Forest Harvesting In Northeastern Minnesota, Philip L. Friest
Journal of the Minnesota Academy of Science
Direct impact of harvesting operations is examined as one segment in a survey of interrelationships between elements of the primary forest products industry in northeastern Minnesota, an area known popularly as the Arrowhead Region. This study follows classifications used in collection of data for 1977 from seven Minnesota counties. Information is based largely on responses from companies involved. An Input-Output model was employed in the study for assessing expenditures by loggers for wage payments, purchase of timber stumpage, vehicles and equipment operation, financial services, and employee benefits (FICA, etc.). Comparisons of relative proportions of expenditures by loggers within the study …
Patterns Of Lakeshore Usage Around Lake Bemidji, Charles S. Holt, Roger A. Schulz, Curtis M. Hadland
Patterns Of Lakeshore Usage Around Lake Bemidji, Charles S. Holt, Roger A. Schulz, Curtis M. Hadland
Journal of the Minnesota Academy of Science
ABSTRACT - The eutrophication of lakes has been the subject of much discussion in scientific journals and the popular press .. Usually the e.utrophication process is accelerated by human activities. This study evaluates the extent of lakeshore development and recreational use of Lake Bemidji in north central Minnesota and examines the willingness of lakeshore residents to be assessed for corrective measures to halt deterioration of this valuable recreational lake. The shoreline of Lake Bemidji is highly developed, and the high density human habitation represents a potential source of nutrients from percolation through the sand and gravel soils which surround the …
Some Interpretations Of A Map On Minnesota Sawmilling, Lyda Belthuis
Some Interpretations Of A Map On Minnesota Sawmilling, Lyda Belthuis
Journal of the Minnesota Academy of Science
Sawmilling in Minnesota started about the time of settlement and, until 1870, mainly consisted of small mills located in the southern half of the state. Mills along the Mississippi River were mainly in urban centers while the remainder were scattered and associated with the clearing of the land and the meeting of the needs of local communities. After 1870, mills become larger. Many were constructed in northern Minnesota. All used forests in the northern port of the state and reduced them so greatly that, by 1920, the mills closed and were replaced by portable sawmills.
Development Of Circadian Sleep-Wakefulness Rhythm In A Healthy Boy Gauged By Circadian Quotients, Ellen Reeker, Michael Diffley
Development Of Circadian Sleep-Wakefulness Rhythm In A Healthy Boy Gauged By Circadian Quotients, Ellen Reeker, Michael Diffley
Journal of the Minnesota Academy of Science
The circadian quotient, briefly CQ, serves to estimate the prominence of a rhythm with a period of about 24 hours. The CQ may be computed from so-called variance spectrum analysis, among other procedures ( 1) . Computational details and some applications have been discussed earlier (1 , 2). We wish to illustrate herein the use of the CQ for gauging the development of a circadian sleep-wakefulness rhythm in the senior author's first-born child, FAR, also documented in general terms, elsewhere ( 3).
Book Reviews
Journal of the Minnesota Academy of Science
Book review of "Great Lakes Basin," A symposium presented at the Chicago meeting of the American Association for the Advancement of Science, 29-30 December, 1959, Ed. by Howard J. Pincus, Pub. No. 71, AAAS, Washington, D.C., 1962.
Growth Study Of Young Gizzard Shad, George Pahl, Gordon Willfahrt
Growth Study Of Young Gizzard Shad, George Pahl, Gordon Willfahrt
Journal of the Minnesota Academy of Science
This investigation was part of a general study aimed at shedding light upon the role of the gizzard shad (Dorosoma cepedianum) as a forage fish of certain game fish species. Recent changes in the populations of such game fish species as the walleye ( Stizastedion vitreum), northern pike ( Esox lucius) , and largemouth bass (Micropterus salmoides) in the upper Mississippi River suggest that the gizzard shad population might have an important bearing on the present situation. The purpose of this investigation was to study the growth rates of the gizzard shad in the Upper Mississippi River during their first …
A Recto-Vestibular Fistula In A Female Pig, M. M. Keith
A Recto-Vestibular Fistula In A Female Pig, M. M. Keith
Journal of the Minnesota Academy of Science
No abstract provided.