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Articles 291421 - 291450 of 292572
Full-Text Articles in Entire DC Network
Nebraska Minerals Which Excite Common Inquiry, E. H. Barbour
Nebraska Minerals Which Excite Common Inquiry, E. H. Barbour
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Nebraska Rocks Which Excite Common Inquiry, E. H. Barbour
Nebraska Rocks Which Excite Common Inquiry, E. H. Barbour
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Nebraska Fossils Which Excite Common Inquiry, E. H. Barbour
Nebraska Fossils Which Excite Common Inquiry, E. H. Barbour
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
A New Mount Of The Fossil Tortoise, "Testudo Orthopygia", E. H. Barbour
A New Mount Of The Fossil Tortoise, "Testudo Orthopygia", E. H. Barbour
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
The Pennsylvanian Formations Of Southeastern Nebraska, Geo E. Condra, N. A. Bengtson
The Pennsylvanian Formations Of Southeastern Nebraska, Geo E. Condra, N. A. Bengtson
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Nebraska Fossils Which Excite Common Inquiry, Erwin H. Barbour
Nebraska Fossils Which Excite Common Inquiry, Erwin H. Barbour
Conservation and Survey Division: Faculty and Staff Publications
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.
Nebraska Rocks Which Excite Common Inquiry, Erwin H. Barbour
Nebraska Rocks Which Excite Common Inquiry, Erwin H. Barbour
Conservation and Survey Division: Faculty and Staff Publications
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.
Nebraska Minerals Which Excite Common Inquiry, Erwin H. Barbour
Nebraska Minerals Which Excite Common Inquiry, Erwin H. Barbour
Conservation and Survey Division: Faculty and Staff Publications
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.
The Round Ligament Of Nebraska Proboscideans, Erwin H. Barbour
The Round Ligament Of Nebraska Proboscideans, Erwin H. Barbour
Conservation and Survey Division: Faculty and Staff Publications
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.
A New Saber-Toothed Cat From Nebraska, Erwin H. Barbour, Harold J. Cook
A New Saber-Toothed Cat From Nebraska, Erwin H. Barbour, Harold J. Cook
Conservation and Survey Division: Faculty and Staff Publications
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
A Phenomenon Of The Kansan Drift In Nebraska, Erwin Hinckley Barbour
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 …
Glacial Geology Work Of Prof. N. H. Winchell, F.W. Sardeson
Glacial Geology Work Of Prof. N. H. Winchell, F.W. Sardeson
Journal of the Minnesota Academy of Science
No abstract provided.
Remarks By Dr. Wm. E. Leonard, Wm. E. Leonard
Remarks By Dr. Wm. E. Leonard, Wm. E. Leonard
Journal of the Minnesota Academy of Science
No abstract provided.
Contributions Of N. H. Winchell To The Geology Of The Iron Ranges Of Minnesota, W.H. Emmons
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.
Newton Horace Winchell, 1839-1914, Warren Upham
Newton Horace Winchell, 1839-1914, Warren Upham
Journal of the Minnesota Academy of Science
No abstract provided.
Tributes From Early Associates
Tributes From Early Associates
Journal of the Minnesota Academy of Science
No abstract provided.
Words Of Appreciation, O. W. Oestlund
Words Of Appreciation, O. W. Oestlund
Journal of the Minnesota Academy of Science
No abstract provided.
The Storage And Use Of Soil Moisture. Report Of Experimental Substation, North Platte, Nebraska, W. W. Burr
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 …
Bulletin No. 134 - The Nitric Nitrogen Content In The Country Rock, Robert Stewart, William Peterson
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 …
A Chemical Study Of The Enrichment Of Copper Sulfide Ores., John Dustin Clark
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.
Portland Cement, Asphalts And Bitumens, George R. Ensminger
Portland Cement, Asphalts And Bitumens, George R. Ensminger
Chemistry Honors Papers
This 37 page thesis classifies and analyzes cements, rock asphalt and bitumen.
Some Phenomena Which Accompany The Electrolysis Of Certain Salt Solutions, When The Electrodes Are Physically Separated By Means Of A Diaphragm Of Solid Gelatine, Containing The Same Salt As Is Used For The Electrolyte: A Study Of The Automatic Termination Of The Electrolysis, When Conducted Under The Above Conditions, Ernest Carl Wagner
Chemistry Honors Papers
This 22 page thesis is a record of work done during the summer of 1910, by Dr. W. H. Stoner, and during the summer of 1912 and the spring of 1914, by the writer, in the Chemical Laboratory of the Medico-Chirurgical College of Philadelphia.
Iii. Phase Change By Reflection – Primarily In The Ultra-Violet, Oliver Gish
Iii. Phase Change By Reflection – Primarily In The Ultra-Violet, Oliver Gish
Department of Physics and Astronomy: Faculty Publications
The first quantitative investigation of absolute phase change was made by Quinckel in 1872. This was followed by that of Wernicke, Wiener, Glan, Hennig, Drude, Koenigsberger and Bender. All these investigations were confined to the visible spectrum except that of Koenigsberger and Bender, who, in addition, measured for a few substances the phase change in the infra-red. So far no measurements of this phenomenon have been made in the ultra-violet.
A Comparison Of Missouri Sandstones, Llewelyn Lodwick
A Comparison Of Missouri Sandstones, Llewelyn Lodwick
Bachelors Theses
"Because of the scarcity of fossils in sandstones, the ages of these stones are difficult to determine except by the fossil bearing rocks either above or below them. Consequently, sandstones, even of the same area, are often separated and correlated with difficulty. It is for this reason that an effort is made to determine a means by which each sandstone may be identified"--Introduction, page 1.
An Investigation In Concentrating A Certain Tailing On Wilfley Tables, Theodore Saunders Dunn, Roy Nicoll Mcbride
An Investigation In Concentrating A Certain Tailing On Wilfley Tables, Theodore Saunders Dunn, Roy Nicoll Mcbride
Bachelors Theses
"The object of this investigation was to determine the adaptibility sic to concentration on a Wilfley table of a certain tailing carrying silver, lead, and zinc. The material was from the tailing dump of the Red Elephant Mine, operated by the Danaher Mining and Milling Company, of Hailey, Idaho, who are now considering treating this material if it can be done economically"--page 2.
Flotation Applied To Basic Ores, Orion Dexter Neal
Flotation Applied To Basic Ores, Orion Dexter Neal
Bachelors Theses
"Concentration, by flotation, as used in to-day is limited to the ores containing an acid gangue. Although, it is probable, that in a few instances flotation schemes are being used on certain ores containing basic gangue, the processes are carefully guarded as trade secrets. It was with ores containing basic gangue that the experiments embodied in this thesis were made, in an effort to determine some means of concentration and also to determine the best conditions for some of the varying factors"--page 1.
The Determination Of The Critical Sizes In Table Concentration, Julius C. Miller, John N. Webster
The Determination Of The Critical Sizes In Table Concentration, Julius C. Miller, John N. Webster
Bachelors Theses
"It has been observed in table concentration that the ore band consists of the coarest sic particles of ore on the bottom or low side. Further up on this ore band the coarse particles grade into finer particles, until a certain marked degree of fineness is reached by which the mineral can no longer adhere to the table top, but must be carried over by the wash water as slimes. To determine the critical size of ore of practical value which will remain in the concentrates band, under certain variable conditions, is the purport of this thesis"--Object of Experiment, page …
Estelle Angier Science Notebook, M. Estelle Angier
Estelle Angier Science Notebook, M. Estelle Angier
Scrapbooks
1914 science notebook of Estelle Angier (Class of 1914). Class notes, descriptions of experiments, and conclusions. Angier added an additional note at the end of the notebook in 1971.
Two New Fossil Dogs Of The Genus "Crynarctus" From Nebraska, E. H. Barbour
Two New Fossil Dogs Of The Genus "Crynarctus" From Nebraska, E. H. Barbour
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Plant Tissue In The Carboniferous Shales Of Nebraska, Erwin H. Barbour
Plant Tissue In The Carboniferous Shales Of Nebraska, Erwin H. Barbour
Conservation and Survey Division: Faculty and Staff Publications
While exploring the newly discovered Eurypterid beds,1 just one mile south of Peru, Nebraska. November 8, 1912, the writer found unusual amounts of actual plant tissue of Carboniferous age. It seems incredible that it should have been preserved through such a lapse of time. Only the most resistant tissue could have endured. When freshly cleaved, the Eurypterid shales reveal innumerable bits and patches of it, mostly bright red in color.