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Articles 291181 - 291210 of 294387
Full-Text Articles in Entire DC Network
The Geology And Geomorphology Of The White Rock Canyon Area, New Mexico, Robert J. Emmanuel
The Geology And Geomorphology Of The White Rock Canyon Area, New Mexico, Robert J. Emmanuel
Earth and Planetary Sciences ETDs
The White Rock Canyon area is in the Rio Grande depression in north-central New Mexico between parallels 35 degrees 33' and 35 degrees 53' and meridians 106 degrees 4' and 106 degrees 21' (Figure 1). It occupies part of western Santa Fe County and eastern Sandoval County. The area was named for White Rock Canyon which has been formed by the Rio Grande. This canyon, called Caja del Rio by the Spanish, meaning "box of the river", begins at the town of Buckman and extends southward as a narrow gorge for a distance of 19 miles. The area encloses 316 …
The Geology And Ground-Water Resources Of Bernalillo County, New Mexico, George M. Ugrinic
The Geology And Ground-Water Resources Of Bernalillo County, New Mexico, George M. Ugrinic
Earth and Planetary Sciences ETDs
The purpose of this investigation has been to gather information which might aid in the proper development and utilization of the ground-water resources of Bernalillo County. Ground-water is one of the most valuable resources in the area. Its importance may best be realized by considering the fact that most of the water used in the County comes from wells. Albuquerque has increased its total annual consumption from 385,000,000 gallons in 1920 to an estimated 2,897,000,000 gallons in 1947, owing largely to a large population increase. Per capita annual consumption rose from 25,400 gallons in 1920 to 55,711 gallons in 1947 …
The Alloys Of Gallium And Indium, C. J. Adams
The Alloys Of Gallium And Indium, C. J. Adams
Bachelors Theses and Reports, 1928 - 1970
Thermal analysis VIPS used to construct cooling and heating curves from which the phase diagram was determined. The data for the entire set of cooling curves were obtained by the use of mercury thermometers.
Hot-Dip Aluminizing Of Low-Carbon Steels, Claude R. Barnes Jr.
Hot-Dip Aluminizing Of Low-Carbon Steels, Claude R. Barnes Jr.
Bachelors Theses and Reports, 1928 - 1970
In a relatively short period of sixty-five years, aluminum has grown to the rank of fifth in total weight of metals produced in the world. Throughout its short life, aluminum has been found to have excellent corrosion-resistant properties; yet only in recent years has aluminum been under consideration as a corrosion-resistant coating for iron and steel.
A Study Of The Intermediary Products Formed During The Life Of A Copper Cyanide Plating Bath, Matthew E. Carlisle
A Study Of The Intermediary Products Formed During The Life Of A Copper Cyanide Plating Bath, Matthew E. Carlisle
Chemistry and Chemical Biology ETDs
Four aims of a study of cyanide baths were:
1. To study the intermediate products formed during the operation of plating and stripping baths under various conditions.
2. To identify these intermediate products or complexes and to determine whether or not they caused the failure of the bath.
3. To consider the conditions that caused a bath to fail, and to be able thereby to increase the life of the bath.
4. To develop a fast, accurate method for controlling the baths, preferably by means of the cyanide content.
The Electrolytic Polishing Of Steel In Solutions Of Sulphuric And Phosphoric Acids, Joseph W. Tripp
The Electrolytic Polishing Of Steel In Solutions Of Sulphuric And Phosphoric Acids, Joseph W. Tripp
Bachelors Theses and Reports, 1928 - 1970
The process of cleaning and pickling the surfaces of steel objects by electrolytic methods has been known and applied since about 1920; the fact that under certain conditions these surfaces acquired a brilliant luster was noted as early as 1928.
Test 438: Minneapolis-Moline Z, Nebraska Tractor Test Lab
Test 438: Minneapolis-Moline Z, Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
An Isothermal Study Of An S.A.E. 6150 Steel, Tom Liss, C. Arentzen
An Isothermal Study Of An S.A.E. 6150 Steel, Tom Liss, C. Arentzen
Bachelors Theses and Reports, 1928 - 1970
The purpose of this thesis is to set forth the method followed, the laboratory procedure practiced, the results obtained, the conclusions drawn, and the recommendations proposed as a consequence of a metallographic study of the isothermal transformation of an S.A.E. 6150 steel.
Isothermal Transformation Of S.A.E. 6150 Steel By The Magnetic Permability Method, Richard R. Douglas
Isothermal Transformation Of S.A.E. 6150 Steel By The Magnetic Permability Method, Richard R. Douglas
Bachelors Theses and Reports, 1928 - 1970
Since the purpose of this thesis is primarily to present an improved mechanical method for plotting isothermal transformations by means of differential magnetic permeability between untransformed austenite and its ultimate transformation product.
A Preliminary Study Of The Benefication Of Montana Corundum, John L. Brown
A Preliminary Study Of The Benefication Of Montana Corundum, John L. Brown
Bachelors Theses and Reports, 1928 - 1970
The objective of this thesis was to affect an efficient and economical recovery of corundum. The corundum occurs as a crude ore admixed with quartz and other diluents. Yet, this material is a potential Montana resource of a valuable non-metallic mineral. In view of the strategic importance and the relatively small production of this mineral in the United States, it seems advisable at this time in world affairs to investigate every possible source of this mineral.
The Renova "Syenite" Porphyry Madison County, Montana, James H. Clement
The Renova "Syenite" Porphyry Madison County, Montana, James H. Clement
Bachelors Theses and Reports, 1928 - 1970
Unique feldspar porphyries, syenitic in appearance, and granitic in composition, form an unusually thick sill intruding pre-Cambrian Belt graywacke about eight miles south of Whitehall in southwestern Montana. Commercial deposits of gold and silver ores occur nearby, and may possibly be genetically related to the porphyry, although direct association is not evident. The geologic age is believed to be late Cretaceous or early Tertiary, and the sill may be related to the Tobacco Root batholith.
A Study Of Some Pre-Cambrian Schists From Yankee Jim Canyon, Park County, Montana, Charles K. Presley
A Study Of Some Pre-Cambrian Schists From Yankee Jim Canyon, Park County, Montana, Charles K. Presley
Bachelors Theses and Reports, 1928 - 1970
One of the most highly deformed metamorphic rock series in Montana is exposed fifteen miles north of Yellowstone Park, Wyoming in the great gorge known as Yankee Jim Canyon, which was formed by Yellowstone River at that point. These metamorphics are Pre-Cambrian in age, and are almost certainly sedimentary in origin, although the involved and intricate folding which they have undergone has long since obliterated any superficial traces of that origin.
The Lilly Mine Of Powell County, Montana, Wilbur Aikin
The Lilly Mine Of Powell County, Montana, Wilbur Aikin
Bachelors Theses and Reports, 1928 - 1970
For many years the Elliston District, of Powell County has been a minor producer of gold, lead, zinc, and silver. Although never among the largest producing districts of the state, it has with the exception of the war years supplied a notable tonnage of ore to the neighboring mills ever since the first placer and lode claims were located there during the late eighteen hundreds.
Geology Of Smoke Hollow Area 8 Miles Southeast Of Deerlodge, Powell County, Montana, Floyd C. Bossard
Geology Of Smoke Hollow Area 8 Miles Southeast Of Deerlodge, Powell County, Montana, Floyd C. Bossard
Bachelors Theses and Reports, 1928 - 1970
This investigation was undertaken primarily as a problem in geologic mapping. The stratigraphy was studied as to the character, age, and sequence of the geologic formations that are exposed. The conclusions were based principally on the field relationships and lithology because no fossils were found.
Structure Of Southwestern Montana, Donald W. Levandowski
Structure Of Southwestern Montana, Donald W. Levandowski
Bachelors Theses and Reports, 1928 - 1970
Intrusions of granitic rocks on a large scale are commonly found in the central part of folded mountain systems. Igneous rocks, intrusive and extrusive, are widespread in the mountains of southwestern Montana. An examination of the structural pattern of this area indicates that the fold trends form a radial pattern. How and why this pattern formed and its relation to the igneous activity in the area have not yet been discussed in the literature.
Basic Sills In Cottonwoood Creek Canyon, Jefferson County, Montana, Dale F. Kittel
Basic Sills In Cottonwoood Creek Canyon, Jefferson County, Montana, Dale F. Kittel
Bachelors Theses and Reports, 1928 - 1970
A stratigraphic section of about 2600 feet of upper Beltian to lower Devonian formations exposed in Cottonwood Creek Canyon 11 miles east of Whitehall, Montana, contains about 20 igneous sills. These sills are from 5 to 20 feet thick, and grade from granogabbro to quartz basalt, except for one sill which is 165 feet thick, and is composed of granogabbro and red syenite. The whole sedimentary series is isoclinally folded, and the sills follow the bedding planes closely with localized crosscutting through the beds.
Was Assimilation Important In The Formation Of The Boulder Batholith?, Richard Marvin
Was Assimilation Important In The Formation Of The Boulder Batholith?, Richard Marvin
Bachelors Theses and Reports, 1928 - 1970
Examination of a rock suite from the northern end of the Boulder batholith reveals that four of the eight criteria for assimilation as given by Grout are present. Thus, in the opinion of the writer, there is evidence and trends to signify assimilation, but no indication of the importance that it played in the formation of the Boulder batholith.
The Bighorn Mountains, The Little Rocky Mountains And The Bowdoin Dome Uplifts, E. J. O'Connell
The Bighorn Mountains, The Little Rocky Mountains And The Bowdoin Dome Uplifts, E. J. O'Connell
Bachelors Theses and Reports, 1928 - 1970
The purpose of this paper is to secure an actual figure describing the amount of uplift in the Bighorn Mountains, the Little Rocky Mountains and the Bowdoin Dome. To the writer’s knowledge, the amount of uplift in the areas mentioned has not been determined before. Such a figure could be useful in structural studies of Montana and Wyoming, because the amount of uplift is a fair measure of the intensity of orogenic forces; also, the amount of uplift is a prerequisite to the determination of the amount of erosion.
Harvest Of Wild And Stocked Fish From The Logan River Drainage, Louis S. Pechacek
Harvest Of Wild And Stocked Fish From The Logan River Drainage, Louis S. Pechacek
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The Logan River heads in the southeastern corner of Franklin County, Idaho, and runs in a south and westerly direction. It enters the state of Utah through the northern boundary in the northeast corner of Cache County. The main stream is fed by two tributary streams which head in separate directions a few miles apart. The Franklin Basin branch is the main contributing tributary while the Beaver Creek branch is nearly as large.
A Test Of Richardson's Equation, Gerald J. Pyne
A Test Of Richardson's Equation, Gerald J. Pyne
Bachelors’ Theses
The purpose of this work is the verification of the above relationship between saturated emission current and temperature, and especially, the evaluation of the current-temperature relating constants, A and theta.
Preparation And Interesterification Of Triacetin, Billy D. Fairman
Preparation And Interesterification Of Triacetin, Billy D. Fairman
Bachelors’ Theses
This project was undertaken because of my interest in organic chemistry, especially in the field of esters. This interest was stimulated through the characterizing of an unknown ester and its reactions as studied in a previous class. At this particular time, my interest has been centered on the interchange of radicals between esters and other compounds.
It is hoped that the results obtained in this thesis will help others in their study of the interesterification of esters, especially of glyceryl triacetate - in this case, with a view toward its application the drying oil industry as a means of preparing …
X-Ray Diffraction Analysis Of Powdered Samples, William T. Gahan
X-Ray Diffraction Analysis Of Powdered Samples, William T. Gahan
Bachelors’ Theses
In the Physics laboratories of Marquette University there are two North American Phillips X-Ray Powder Diffraction Cameras. The purpose of this thesis is to place these cameras into operating order, and to check the results obtained from them. Special Telechron motors were fastened to the frame of the cameras to rotate the samples one revolution per minute, adaptable ways were machined to rest the cameras on.
Fluorescent Effects Produced By Rare Earth Elements, William J. Stekiel
Fluorescent Effects Produced By Rare Earth Elements, William J. Stekiel
Bachelors’ Theses
The subject matter of this thesis had its origin in a phenomena observed in the laboratory during a crystal analysis experiment by means of X-ray diffraction. While using crystals composed mainly of Neodynium and related rare earths as specimens, it was found that an unaccountable darkening of the film occurred in the region near the sample. This excessive darkening (over and above the normal amount produced by incident X-rays) was attributed to some type of back scattering of radiant energy produced by the crystalline elements composing the sample. Thus, the problem of this thesis was to carry out some simple …
Microradiography With Biological Specimens, Arthur D. Wellman
Microradiography With Biological Specimens, Arthur D. Wellman
Bachelors’ Theses
Microradiography is a technique in which X-rays are directed through a very thin specimen onto a fine-grained photographic film and the image examined under magnification. It has been used chiefly as a supplementary tool in industrial analysis of metal structures, and even in this field has attained prominence only within the past decade. Its usefulness is limited to fine structures (except where minute flaws or impurities are to be examined in a material), and its success is limited by the degree of clarity in the radiograph to be magnified.
Calibration Of An X-Ray Unit As To Effective Wave-Lengths By Comparing Absorption Coefficients, Jerome James Woyci
Calibration Of An X-Ray Unit As To Effective Wave-Lengths By Comparing Absorption Coefficients, Jerome James Woyci
Bachelors’ Theses
The purpose of this paper is to determine by the mass absorption coefficients of various substances, namely, aluminum, copper and iron, the effective wave-length of an X-ray beam which passes through particular thicknesses of the above materials. Since an X-ray tube does not emit a monochromatic wavelength but emits heterogeneous wave-lengths, we had to use a comparative method in order to obtain the desired results. It happens that the mass coefficient of absorption of carbon does not vary appreciably with an increase or decrease in wavelength, hence, we can use carbon as our standard or material to which we can …
Additional Equations For The Wigner_Seitz Model Of Solids, Alex Sharley Keene
Additional Equations For The Wigner_Seitz Model Of Solids, Alex Sharley Keene
Bachelors’ Theses
This report consists of an extension of the Wigner-Seitz equations to particular cases and boundary conditions. These equations are tools whereby energy bands and wave functions for a face centered lattice can be determined.
Design Construction And Use Of A Device To Demonstrate Motion In Two Dimensions, Robert R. Karnopp
Design Construction And Use Of A Device To Demonstrate Motion In Two Dimensions, Robert R. Karnopp
Bachelors’ Theses
The production of visual materials is an interesting and challenging field for many teachers. This is a type of activity which has possibilities for teacher improvement, and which, at the same time, involves the production of instructional materials that are timely.
The Possibility Of Mercuric Sulfide Having A Yellow Color, John Joseph Savignac
The Possibility Of Mercuric Sulfide Having A Yellow Color, John Joseph Savignac
Bachelors’ Theses
The author chose this particular problem because it is directly connected with a subject which he had previously studied and found very interesting. It was also of interest to this author because the answer to the immediate problem must be definite and without qualification, thus leaving no room for ambiguity.
An Investigation Of The Charge Acquired By A Metal Plate When Irradiated By X-Rays, Bernard Keith Betz
An Investigation Of The Charge Acquired By A Metal Plate When Irradiated By X-Rays, Bernard Keith Betz
Bachelors’ Theses
The Photo-electric effect upon metals irradiated by X-rays can, under certain circumstances be completely concealed by some other phenomenon, unless certain precautions are made. It is the purpose of this paper to discuss the properties of this phenomenon.
Electrometric Microdetermination Of Water In Tungsten And Molybdenum Metal Powders By The Karl Fischer Reagent, Helen C. Efinger
Electrometric Microdetermination Of Water In Tungsten And Molybdenum Metal Powders By The Karl Fischer Reagent, Helen C. Efinger
Bachelors’ Theses
The problem of the determination of the moisture content or metal powders has been suggested by the Fansteel Metallurgical Corporation, where I was formerly employed, as one which might prove of interest to them. I have been particularly interested in a topic of this nature since my only laboratory experience has been in metallurgical chemistry.
In this work I intend to make a comparison and evaluation of various methods of determining the moisture content of tungsten and molybdenum powders in order to show which would be the most applicable. Most of the common methods for determining the amount of moisture …