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Articles 291151 - 291180 of 292133

Full-Text Articles in Physical Sciences and Mathematics

A Giant Nebraska Bear "Dinarchtotherium Merriama", E. H. Barbour Jan 1916

A Giant Nebraska Bear "Dinarchtotherium Merriama", E. H. Barbour

Conservation and Survey Division

No abstract provided.

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Bulletin No. 139 - The Movement Of Soluble Salts With The Soil Moisture, F. S. Harris May 1915

Bulletin No. 139 - The Movement Of Soluble Salts With The Soil Moisture, F. S. Harris

UAES Bulletins

In irrigated districts, where excessive quantities of water are used, there is usually an accumulation of alkali salts in the soils of the lower lands. These salts are probably dissolved from the soils through which the percolating waters pass and are carried along until the water comes to the surface and is evaporated, when the salts are deposited as a crust at the surface. Many of the most fertile soils of the arid regions have been ruined by the bringing to the surface of soluble salts in such large quantities that the growth of crops is prohibited. The rapidity with …

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The Electro Deposition Of Lead In Sugar And Acetate Solutions, Abe Lew Kaplan Jan 1915

The Electro Deposition Of Lead In Sugar And Acetate Solutions, Abe Lew Kaplan

Bachelors Theses

"The experiments, while hardly sufficiently numerous, seemed to indicate that sugars do not have a good effect on cathodic lead deposits"--Conclusion, page 14.

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The Electrolysis Of Potassium Lead Tartrate Solutions, Reginald Scott Dean Jan 1915

The Electrolysis Of Potassium Lead Tartrate Solutions, Reginald Scott Dean

Bachelors Theses

"Kahlenberg and Hillyer have shown that lead oxide (PbO) dissolves in neutral potassium tartrate to form a strongly alkaline solution in which the ratio of potassium to lead is 1:1. Since this solution shows a very low concentration of lead ion it might be expected to give a smooth and adherent cathode deposit. The purpose of this thesis is to determine its possible applicability as a refining electrolyte"--page 1.

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The Round Ligament Of Nebraska Proboscideans, Erwin H. Barbour Jan 1915

The Round Ligament Of Nebraska Proboscideans, Erwin H. Barbour

Conservation and Survey Division

Comparisons of the acetabula of various mastodons and mammoths common to Nebraska show conclusively that absence of the round ligament is not a characteristic of the proboscidea, as generally accepted. From the specimens in our collections, there is evidence that the ligament was not on! y present, but was uncommonly large and well developed in the earlier Nebraska proboscideans. Examination of material collected since 1891, and preserved in the cabinets of the Nebraska State Museum. and the Morrill Geological Collections, makes it apparent that all Nebraska proboscideans had round ligaments, though perhaps the latest survivors did not.

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A New Sabertoothed Cat From Nebraska, Erwin H. Barbour, Harold J. Cook Jan 1915

A New Sabertoothed Cat From Nebraska, Erwin H. Barbour, Harold J. Cook

Conservation and Survey Division

No abstract provided.

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Nebraska Fossils Which Excite Common Inquiry, Erwin H. Barbour Jan 1915

Nebraska Fossils Which Excite Common Inquiry, Erwin H. Barbour

Conservation and Survey Division

This paper must not be mistaken for a report on the fossils of Nebraska. It is merely a circular letter to correspondents describing and figuring those fossils only which occasion frequent comment. In two recent papers of the Survey consideration was given to the common minerals and rocks of Nebraska, and it seems opportune to briefly discuss our fossils in a like manner. Probably no other State can boast of such a well-preserved and varied fauna.

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Nebraska Minerals Which Excite Common Inquiry, Erwin H. Barbour Jan 1915

Nebraska Minerals Which Excite Common Inquiry, Erwin H. Barbour

Conservation and Survey Division

The Minerals, Rocks, and Fossils of Nebraska, which Excite Common Inquiry, are treated brefly in leaflets numbered 37, 37a, 37b, respectively. These are intended to serve as circular letters to correspondents. Possibly they may prove to be acceptable and helpful in a measure to teachers and others who conduct parties of school children on field excursions.

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Nebraska Rocks Which Excite Common Inquiry, Erwin H. Barbour Jan 1915

Nebraska Rocks Which Excite Common Inquiry, Erwin H. Barbour

Conservation and Survey Division

This leaflet it intended to serve as an answer to correspondents who make inquiry about the rocks of Nebraska1. Unfortunately for those interested in such matters, the rocks of the State are few in number, and are deeply buried from view by sand and soil, so there are thousands of square miles in which even a pebble is a rarity. That our rocks are level and undisturbed is practically true. Still there are some surprisingly interesting folds and faults.

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Nebraska Green Quartzite An Import Ant Future Industry, Erwin H. Barbour Jan 1915

Nebraska Green Quartzite An Import Ant Future Industry, Erwin H. Barbour

Conservation and Survey Division

ln southern Harlan and Franklin counties, there occur many acres of green quartzite which must be of commercial consequence when made available. It is a neglected resource upon which important industries are sure to be based. With the development of this bed in view, the Nebraska Geological Survey has examined this area. and through this leaflet wishes to place the results before possible investors.

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A New Saber-Toothed Cat From Nebraska, Erwin H. Barbour, Harold J. Cook Jan 1915

A New Saber-Toothed Cat From Nebraska, Erwin H. Barbour, Harold J. Cook

Conservation and Survey Division

During the field season of 1913, while exploring the Pliocene beds of Brown County, Mr. A. C. Whitford, a Fellow in the Department of Geology, University of Nebraska, discovered the mandible of a new machaerodont cat. His work in this region was in the interest of the Nebraska Geological Survey and the Morrill Geological Expeditions.1

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Notes On The Geology Of Sioux County, Nebraska, And Vicinity, H. J. Cook Jan 1915

Notes On The Geology Of Sioux County, Nebraska, And Vicinity, H. J. Cook

Conservation and Survey Division

No abstract provided.

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The Pennsylvanian Formations Of Southeastern Nebraska, Geo E. Condra, N. A. Bengtson Jan 1915

The Pennsylvanian Formations Of Southeastern Nebraska, Geo E. Condra, N. A. Bengtson

Conservation and Survey Division

No abstract provided.

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Nebraska Green Quartzite - An Important Future Industry, E. H. Barbour Jan 1915

Nebraska Green Quartzite - An Important Future Industry, E. H. Barbour

Conservation and Survey Division

No abstract provided.

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The Round Ligament Of Nebraska Proboscideans, E. H. Barbour Jan 1915

The Round Ligament Of Nebraska Proboscideans, E. H. Barbour

Conservation and Survey Division

No abstract provided.

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A New Mount Of The Fossil Tortoise, "Testudo Orthopygia", E. H. Barbour Jan 1915

A New Mount Of The Fossil Tortoise, "Testudo Orthopygia", E. H. Barbour

Conservation and Survey Division

No abstract provided.

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A New Mammoth, "Elephas Hayi," From Crete, Nebraska, E. H. Barbour Jan 1915

A New Mammoth, "Elephas Hayi," From Crete, Nebraska, E. H. Barbour

Conservation and Survey Division

No abstract provided.

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Nebraska Minerals Which Excite Common Inquiry, E. H. Barbour Jan 1915

Nebraska Minerals Which Excite Common Inquiry, E. H. Barbour

Conservation and Survey Division

No abstract provided.

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Nebraska Rocks Which Excite Common Inquiry, E. H. Barbour Jan 1915

Nebraska Rocks Which Excite Common Inquiry, E. H. Barbour

Conservation and Survey Division

No abstract provided.

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Nebraska Fossils Which Excite Common Inquiry, E. H. Barbour Jan 1915

Nebraska Fossils Which Excite Common Inquiry, E. H. Barbour

Conservation and Survey Division

No abstract provided.

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A Phenomenon Of The Kansan Drift In Nebraska, Erwin Hinckley Barbour Nov 1914

A Phenomenon Of The Kansan Drift In Nebraska, Erwin Hinckley Barbour

Department of Earth and Atmospheric Sciences: Faculty Publications

Among the minor phenomena of the glacial drift in Nebraska there is one which, though rarely observed by the public, is of interest and should be commended to the attention of naturalists. The reference here is to certain large, well-defined masses or blocks of such materials as sand, gravel, and coarse pebbles, which occur imbedded in the drift clays along with glacial bowlders, and which presumably have been similarly transported and deposited. These masses or blocks vary widely in color, texture, and kind. They also vary from the glacial matrix in which they are found and are the more striking …

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Glacial Geology Work Of Prof. N. H. Winchell, F.W. Sardeson Jul 1914

Glacial Geology Work Of Prof. N. H. Winchell, F.W. Sardeson

Journal of the Minnesota Academy of Science

No abstract provided.

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Tributes From Early Associates Jul 1914

Tributes From Early Associates

Journal of the Minnesota Academy of Science

No abstract provided.

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Newton Horace Winchell, 1839-1914, Warren Upham Jul 1914

Newton Horace Winchell, 1839-1914, Warren Upham

Journal of the Minnesota Academy of Science

No abstract provided.

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Contributions Of N. H. Winchell To The Geology Of The Iron Ranges Of Minnesota, W.H. Emmons Jul 1914

Contributions Of N. H. Winchell To The Geology Of The Iron Ranges Of Minnesota, W.H. Emmons

Journal of the Minnesota Academy of Science

No abstract provided.

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Words Of Appreciation, O. W. Oestlund Jul 1914

Words Of Appreciation, O. W. Oestlund

Journal of the Minnesota Academy of Science

No abstract provided.

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Remarks By Dr. Wm. E. Leonard, Wm. E. Leonard Jul 1914

Remarks By Dr. Wm. E. Leonard, Wm. E. Leonard

Journal of the Minnesota Academy of Science

No abstract provided.

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The Storage And Use Of Soil Moisture. Report Of Experimental Substation, North Platte, Nebraska, W. W. Burr Jul 1914

The Storage And Use Of Soil Moisture. Report Of Experimental Substation, North Platte, Nebraska, W. W. Burr

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The profitable cultivation of the non-irrigable lands in west central and western Nebraska is limited by the amount and efficient use of the precipitation. There are tracts of land in the sand hills and minor tracts of badly worn heavier soils where the need of soil fertility is becoming evident. But, in the main, the great problem at present is not one of soil fertility, but of how to get enough water to make use of the fertility now present. The rainfall of this section, which varies from an actual shortage to seldom more than a meager sufficiency, makes it …

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A Chemical Study Of The Enrichment Of Copper Sulfide Ores., John Dustin Clark Jun 1914

A Chemical Study Of The Enrichment Of Copper Sulfide Ores., John Dustin Clark

UNM Bulletins

The author reports on the results of sixty experiments on processes related to the enrichment of the sulfide ores of copper. Also submitted to Leland Stanford Junior University toward the Degree of Doctor of Philosophy.

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Bulletin No. 134 - The Nitric Nitrogen Content In The Country Rock, Robert Stewart, William Peterson Jun 1914

Bulletin No. 134 - The Nitric Nitrogen Content In The Country Rock, Robert Stewart, William Peterson

UAES Bulletins

In many arid sections of Western America there have been reported marked accumulations of nitrates in the cultivated soil. Hilgard,(1) who was the first to observe these accumulations, believed that the nitrates are being formed at the present time by the rapid nitrification of the organic matter contained in the soil. In Colorado there has been considerable trouble with orchards dying; the death of the trees in some cases has been attributed to the excessive accumulations of nitrates in the cultivated soil. These accumulations are due, according to Dr. Headden,(2) to the fixation of atmospheric nitrogen by bacteria now at …

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