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Articles 301621 - 301650 of 302505
Full-Text Articles in Physical Sciences and Mathematics
A Comparison Of Various Methods Of Assaying Cyanide Solutions For Gold, Theodore Saunders Dunn
A Comparison Of Various Methods Of Assaying Cyanide Solutions For Gold, Theodore Saunders Dunn
Bachelors Theses
"Although there has been a great deal written on the different methods of assaying cyanide solutions and new methods are being devised constantly there has been very little said as to the relative merits of the methods in use. An attempt has therefore been made in this paper to compare several of the methods now used"--page 1.
A Study Of The Roubidoux In The Vicinity Of Rolla, John Elmer Schultz, William Grover Branham
A Study Of The Roubidoux In The Vicinity Of Rolla, John Elmer Schultz, William Grover Branham
Bachelors Theses
"The purpose of this investigation was to discover the character of the texture and structural features of the Roubidoux within the area and the probable agencies which worked to produce them"--Purpose of Investigation, page 3.
Extinct Pleistocene Mammals Of Minnesota, N. H. Winchell
Extinct Pleistocene Mammals Of Minnesota, N. H. Winchell
Journal of the Minnesota Academy of Science
No abstract provided.
Hennepin At The Falls Of St. Anthony, N. H. Winchell
Hennepin At The Falls Of St. Anthony, N. H. Winchell
Journal of the Minnesota Academy of Science
No abstract provided.
Englacial And Superglacial Drift In Minnesota, The Dakotas, And Manitoba, Warren Upham
Englacial And Superglacial Drift In Minnesota, The Dakotas, And Manitoba, Warren Upham
Journal of the Minnesota Academy of Science
No abstract provided.
The Structure Of The Universe: Being A Presentation Of Professor Osborne Reynolds' Theory Of Gravitation, John Mackenzie
The Structure Of The Universe: Being A Presentation Of Professor Osborne Reynolds' Theory Of Gravitation, John Mackenzie
Journal of the Minnesota Academy of Science
No abstract provided.
Geographical Influences In The Development Of Nebraska, George E. Condra
Geographical Influences In The Development Of Nebraska, George E. Condra
George E. Condra Publications
Nebraska is centrally located in the mainland of the United States, being a part of the long slope of the High Plains Regions.
Some Ore Deposits In Maine And The Milan Mine, New Hampshire, William H. Emmons
Some Ore Deposits In Maine And The Milan Mine, New Hampshire, William H. Emmons
Maine Collection
Some Ore Deposits in Maine and The Milan Mine, New Hampshire
by William H. Emmons
Department of the Interior, United States Geological Survey - Bulletin 432
Washington, D.C. (1910).
Contents: Introduction / Geology / Ore Deposits / Descriptions of Mines / Mines of Hancock County / Mines of Washington County / Mines in Somerset and Oxford Counties / Milan Mine, New Hampshire / Index
Ua94/6/2/14 Physiography Notebook, Annie Reis
Ua94/6/2/14 Physiography Notebook, Annie Reis
Student/Alumni Personal Papers
Physiography notebook kept by student Annie Reis in 1910. Notebook includes notes and drawings related to physical geography such as solar systems, rivers, faults, weather and glaciers.
Preliminary Notes On The Carboniferous Flora Of Nebraska, Roy V. Pepperberg
Preliminary Notes On The Carboniferous Flora Of Nebraska, Roy V. Pepperberg
Conservation and Survey Division
About the middle of July, 1907, while engaged by the Nebraska City Commercial Club in examining the geology of Nebraska City and vicinity, the writer was called b the farm of Mr. C. B. James to look at a bed of what was supposed to be fire clay. This proved to be a Carboniferous deposit of stratified micaceous sandstone, interstratified with a fine compact shale, both of which are yellow in color and very fragile when wet.
Coal In Nebraska, Roy V. Pepperberg
Coal In Nebraska, Roy V. Pepperberg
Conservation and Survey Division
Until February, 1906, Nebraska was termed "the state without a mine," and may still be called the state with but a single mine, and yet it would be impossible to tell how much prospecting has been done, or to estimate the number of thousands of dollars that have been spent in this state trying to develop paying mines from the thin beds of coal discovered throughout various parts of the state in the Carboniferous and Cretaceous formations.
Coal In Nebraska, Roy V. Pepperberg
Coal In Nebraska, Roy V. Pepperberg
Conservation and Survey Division
Until February, 1906, Nebraska was termed "the state without a mine," and may still be called the state with but a single mine, and yet it would be impossible to tell how much prospecting has been done, or to estimate the number of thousands of dollars that have been spent in this state trying to develop paying mines from the thin beds of coal discovered throughout various parts of the state in the Carboniferous and Cretadeous formations.
The Development Of Our Natural Resources, E. H. Barbour
The Development Of Our Natural Resources, E. H. Barbour
Conservation and Survey Division
No abstract provided.
Bulletin No. 106 - A Study Of The Production And Movement Of Nitric Nitrogen In An Irrigated Soil, Robert Stewart, J. E. Greaves
Bulletin No. 106 - A Study Of The Production And Movement Of Nitric Nitrogen In An Irrigated Soil, Robert Stewart, J. E. Greaves
UAES Bulletins
The problem of maintaining the nitrogen content in our agricultural soils is one of vital importance to the development of a permanent system of agriculture. Any investigation, therefore, which tends to throw any light on the conditions which are necessary for maintaining the maximum supply of nitrogen in our soils needs no apology for its institution.
Letter From Francis Mairs Huntington-Wilson To Gifford Pinchot, May 26, 1909, Francis Mairs Huntington-Wilson
Letter From Francis Mairs Huntington-Wilson To Gifford Pinchot, May 26, 1909, Francis Mairs Huntington-Wilson
Other Correspondence
The document is a carbon copy of a typed letter from the Assistant Secretary of State to Gifford Pinchot concerning the Conservation Congress.
Report On A Portion Of The Soda Springs Mining District In Bernalillo County, New Mexico, Edmund Ross
Report On A Portion Of The Soda Springs Mining District In Bernalillo County, New Mexico, Edmund Ross
Earth and Planetary Sciences ETDs
No abstract provided.
Effect Of Certain Minerals On Fire Assay Of Lead, Earl Mccolloch Smith, Rowe Francis Mccrae
Effect Of Certain Minerals On Fire Assay Of Lead, Earl Mccolloch Smith, Rowe Francis Mccrae
Bachelors Theses
"Our problem was to determine the affect in the lead assay of certain minerals commonly accompanying lead ores. The minerals used were calcite, pyrite, blende and chalcocite"--page
A Study Of Some Problems In Assaying, Aaron Max Shah
A Study Of Some Problems In Assaying, Aaron Max Shah
Bachelors Theses
"It is known that the lead button which we obtain from fire assay for silver does not represent the true value of the ore. There is always a loss of silver. To investigate the effect of varying the fluxes on the loss in silver is the object of the first part of this thesis...Silver ores often contain copper, part of which, during the fusion, enters the lead button, causing trouble during cupellation, since it must be done at a high temperature. It is, then, important to keep copper out of the lead button. The presence of litharge in the fusion …
Technical Analysis Of Corn Products, Roy Hayward Dewaters
Technical Analysis Of Corn Products, Roy Hayward Dewaters
Bachelors Theses
"This thesis treats of the technical analysis of the products of corn as used in practical work in the manufacture of starch and glucose. These notes are the results of special investigation carried on along this line"--page 1.
The Oil Industry Of The Coalinga Field, A. Emory Wishon
The Oil Industry Of The Coalinga Field, A. Emory Wishon
Bachelors Theses
No abstract provided.
The Influence Of Pyrite On The Oxidation Of Galena, William Newton Clark, Mark Stephen Mazany
The Influence Of Pyrite On The Oxidation Of Galena, William Newton Clark, Mark Stephen Mazany
Bachelors Theses
"In this paper are given: (1) Confirmatory evidence of the influence of pyrite on the rate of oxidation of galena under conditions approximately natural, geological conditions. (2) Detailed description of all the chemical analyses involved"--page 19.
The Oxidation Of Natural Sulphides, Harry Clay Kibe
The Oxidation Of Natural Sulphides, Harry Clay Kibe
Bachelors Theses
"Work upon the oxidation of natural sulphides done at this laboratory indicates that laboratory methods might be successfully employed in seeking explanations of certain actual problems in the theory of ore deposition. This led me to experiment further with galena, sphalerite, and iron pyrite, which work confirms the results of Gottschalk and Buehler, namely, that the course of an oxidation is materially effected when mixtures of sulphides are employed rather than single individual minerals"--page 1.
Paleogeographic Maps Of North America, Bailey Willis
Paleogeographic Maps Of North America, Bailey Willis
United States Geological Survey: Staff Publications
In passing from the Jurassic to the Lower Cretaceous North America underwent but little change along the Atlantic border and throughout the east. It remained a low land and the coastal plain was somewhat more deeply submerged. But on the Pacific coast, on the contrary, there was pronounced movement, particularly in the Coast Range of California. A bold peninsula developed from Oregon south to Santa Barbara and, being eroded, yielded the thick sediments of the Shasta group, which were deposited in marine water east of it, in part.
In Alaska the Shastan sea appears to have invaded the Jurassic land …
Chemical Analysis Of Foods And Their Adulterants: Being An Investigation Into The Nature, Relative Value And More Common Forms Of Adulterations Of Certain Foods, William Samuel Long
Chemical Analysis Of Foods And Their Adulterants: Being An Investigation Into The Nature, Relative Value And More Common Forms Of Adulterations Of Certain Foods, William Samuel Long
Chemistry Honors Papers
This 26 page thesis examines the composition, natural variations, and artificial variations of various foods.
Bulletin No. 104 - The Storage Of Winter Precipitation In Soils, John A. Widtsoe
Bulletin No. 104 - The Storage Of Winter Precipitation In Soils, John A. Widtsoe
UAES Bulletins
It has been found that the production of one pound of dry plant substance on soils of average fertility, requires in humid districts not more than five hundred pounds of water, and in arid districts like Utah about seven hundred and fifty pounds. This indicates that the average rainfall of Utah, which is about twelve inches, if properly conserved in the soil, is sufficient to produce annually, without irrigation, from thirty to forty-five bushels of wheat to the acre, or corresponding yields of other crops. The realization of this truth has changed greatly our views of irrigation practices. The beginning …
The Effect Of Certain Minerals Upon The Volatilization Of Silver Chloride, Boyd Dudley Jr.
The Effect Of Certain Minerals Upon The Volatilization Of Silver Chloride, Boyd Dudley Jr.
Bachelors Theses
"The work undertaken in this investigation was first suggested in connection with the analytical determination of Silver and Chlorine by weighing silver chloride. Later, however, the experiments assumed a metallurgical character. The final purpose of the experiments was to determine the effect of a few of the common mineral constituents of ores on the loss of silver during a chloridizing roast. In the metallurgy of silver it is frequently necessary to change the silver bearing minerals into silver chloride"--page 1.
The Effect Of Antimony On The Assay Of Gold And Silver Ores, Herman Carl Hase, Charles Lewis French
The Effect Of Antimony On The Assay Of Gold And Silver Ores, Herman Carl Hase, Charles Lewis French
Bachelors Theses
"Our problem was to determine the effect of antimony in assaying for gold and silver. The method of attack was to find loss of gold and silver: 1) with variable antimony and a constant temperature. 2) with variable temperature and constant antimony"--page 1.
Several Lines Of A Letter From Euler To The Royal Society Dated 21 October/1 November 1768, Leonhard Euler
Several Lines Of A Letter From Euler To The Royal Society Dated 21 October/1 November 1768, Leonhard Euler
All Works by Eneström Number
No abstract provided.
The Sand And Gravel Resources And Industries Of Nebraska, George Evart Condra
The Sand And Gravel Resources And Industries Of Nebraska, George Evart Condra
George E. Condra Publications
Sand and gravel are Nebraska's most important mineral resources. The extensive use which is made of these materials in the building and trade industries not only in our own but in adjoining states, is a factor of economic importance in the industrial development of Nebraska.
The Skull Of Moropus, Erwin Hinckley Barbour
The Skull Of Moropus, Erwin Hinckley Barbour
Conservation and Survey Division
During the summer of 1905 the Morrill Geological Expedition of the University of Nebraska had the good fortune to discover early in July the skull of Moropus. Associated with it were mandible, atlas and other cervicals, and various skeletal parts.