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Articles 69031 - 69060 of 69073
Full-Text Articles in Physical Sciences and Mathematics
A Process For The Separation Of Barite And Sphalerite, Cairy C. Conover, Edwin Robinson Morris
A Process For The Separation Of Barite And Sphalerite, Cairy C. Conover, Edwin Robinson Morris
Bachelors Theses
"The present price of zinc has stimulated a greater interest in Sphalerite Barite separations than has been manifested for some time. A great many processes have been worked on and have failed for many reasons, the main one being that the physical characteristics of the ore varied so much. The process that is successful must be independent of these variations. The following process is one that depends on a chemical phenomenon and is adapted to any sphalerite-barite separation. This series of experiments was performed by the authors at the Missouri School of Mines and Metallurgy, Rolla, Mo. and was embodied …
The Determination Of The Settling Velocity Of Certain Minerals Common In Ore-Dressing, Oscar N. Bribach, Robert Winters Johnson
The Determination Of The Settling Velocity Of Certain Minerals Common In Ore-Dressing, Oscar N. Bribach, Robert Winters Johnson
Bachelors Theses
"The object of this thesis is to determine the settling velocity of certain minerals common in ore-dressing work. The minerals used in the experiments were marcasite and chert. These two minerals were chosen because there was a convenient supply of both from which pure and uniform particles could be obtained"--page 4.
Checker Board Drainage Due To Eroded Dikes, Julian Adolph Hielscher
Checker Board Drainage Due To Eroded Dikes, Julian Adolph Hielscher
Bachelors Theses
"The conclusions here drawn are the results of observations made during the past ten summers spent in this region while camping, fishing, and hunting; at first, with the native game wardens and fire rangers; later on independently or in company with some of the many tourists who annually visit this delightful region. In this manner it has been possible to cross and re-cross this territory in almost every direction. The highways into this wilderness are the streams and lakes and the only method of travel is by canoe, though short excursions can be made over land by following the paths …
Some Assay Problems, James Howard Chase
Some Assay Problems, James Howard Chase
Bachelors Theses
"The object of this thesis is to attempt to solve a few of the many problems of assaying. Each problem is handled separately from, and independently of the others"--page 1.
A Study Of The Precipitation Of Iron Di-Sulphide And Its Relation To Certain Types Of Deposits, Vachel Harry Mcnutt
A Study Of The Precipitation Of Iron Di-Sulphide And Its Relation To Certain Types Of Deposits, Vachel Harry Mcnutt
Masters Theses
"Very few of the interesting points bearing upon the formation of iron di-sulphide will be treated in this paper. The laboratory tests made are considered to have been sufficiently thorough to substantiate the ideas set forth so that exhaustive tests were not necessary. While the field evidence was collected largely in the Joplin district of Missouri, the conclusions are sufficiently generalized to be applicable to any district in which pyrite and marcasite have been derived from cold solutions"--page 2.
A Summary Of The Theories Of The Origin Of The Lake Superior Copper Ores, With Evidences Pertaining Thereto, Eva Endurance Hirdler
A Summary Of The Theories Of The Origin Of The Lake Superior Copper Ores, With Evidences Pertaining Thereto, Eva Endurance Hirdler
Bachelors Theses
"In each of the foregoing theories we obtain sound reasoning in connection with many facts. Therefore a correlation of these facts ought to give us enough material to deduct a sound theory. The most plausible supposition seems to be that all metallic ores are derived ultimately from the interior of the earth, from a great metallographic province, when they are delivered by igneous eruptives near or at the surface"--Conclusion With Reasons, page 29.
A Comparison Of The Silver Losses Due To Cupellation Using Different Kinds Of Cupels, James A. Taggart, Anton Frederick Karte
A Comparison Of The Silver Losses Due To Cupellation Using Different Kinds Of Cupels, James A. Taggart, Anton Frederick Karte
Bachelors Theses
"In this thesis our object has been to ascertain the silver losses in cupellation with different kinds of cupel materials, thereby determining the efficiency of the various materials used for making cupels. When beginning this work we hardly expected to find such differences in behavior of the various cupels used. However we refer the reader to our curves to see what really happened"--page 2.
A Sanitary Study Of The Well Waters Of Rolla, Alexander Grosberg, Sam Paul Lindau
A Sanitary Study Of The Well Waters Of Rolla, Alexander Grosberg, Sam Paul Lindau
Bachelors Theses
"In undertaking the analysis of the well waters of Rolla, it was done with the hope that the factors governing the purity of well waters would be brought out. Such a study would also be of great help in determining the proper location and depth of the wells in the community"--Introduction, Page 1.
Evidence Pertaining To The Origin And Deposition Of Ore Deposits, James Edward Mcgoughran
Evidence Pertaining To The Origin And Deposition Of Ore Deposits, James Edward Mcgoughran
Bachelors Theses
"In looking over the evidence grouped in the foregoing tables it is at once evident that by far the greater number of the ore deposits are associated with igneous rocks, and that they have resulted from deposition from not solution. It appears that, relatively, deposition by segregation from an igneous magma is of much less importance than deposition from solution, in the formation of ore bodies. However, segregation is the only explanation possible in accounting for some very important deposits, but they are very few in number. In distinguishing between deposits resulting from hot ascending meteoric solutions and those resulting …
A Study Of Some Problems In Cyaniding, Sidney S. Schmidt, Russell B. Caples
A Study Of Some Problems In Cyaniding, Sidney S. Schmidt, Russell B. Caples
Bachelors Theses
"The object of the following tests was rather to determine quantitatively the consumption of Potassium Cyanide and of Sodium Cyanide when agitated by compressed air, and when agitated by compressed air in the presence of iron pyrite and in the presence of iron filings, than to explain chemically the causes for this consumption"--Part One, page 1. "The following tests were made to study the rate of percolation of water, under certain conditions, through pure quartz. the information sought is of importance in the cyanide process. By "rate of percolation" we mean the distance traveled in a unit time, by water …
An Investigation Of Certain Methods For The Determination Of Gold In Cyanide Solutions, James Joseph Bowles
An Investigation Of Certain Methods For The Determination Of Gold In Cyanide Solutions, James Joseph Bowles
Bachelors Theses
"Some questions having been raised as to the reliability of the various methods for the quantitative determination of gold in cyanide solution, this work was undertaken with the view of determining the relative accuracy and convenience of these methods"--page 2.
Chemical Analyses Of Special Tool Steels, Elmer List
Chemical Analyses Of Special Tool Steels, Elmer List
Bachelors Theses
No abstract provided.
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.
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.
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.
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.
Design Of A Lead Blast Furnace, Walter Irving Phillips, Andrew Jackson Seltzer
Design Of A Lead Blast Furnace, Walter Irving Phillips, Andrew Jackson Seltzer
Bachelors Theses
"In order to get the approximate size of the Furnace we made the following assumptions, being guided as far as possible by the practice of the Globe Smelting Works at Denver, Colorado whenever that could be ascertained"--page 1.
Analyses Of Limestones And Shales, Byron John Snyder
Analyses Of Limestones And Shales, Byron John Snyder
Bachelors Theses
"The limestones were analyzed to determine their value for cement and lime manufacture, and were taken from several counties in the state of Missouri. Most of the limestones examined were very pure. A considerable quantity of well burned lime is added to other material in the manufacture of cement, a lime of very pure type being the most acceptable in this work"--page 1.
Analytical Determination Of Copper Products, Charles Dosh Smith
Analytical Determination Of Copper Products, Charles Dosh Smith
Bachelors Theses
"It is a well known fact that the presence of impurities in copper products has been a source of annoyance to the Chemist. The object of this thesis was to make myself familiar with the actions of different impurities in copper products, and the methods for the determination of Arsenic in the same"--page 1.
Neutralization Of Free Acid (H₃P O₄) In Commercial Mono-Calcium Phosphate (Ca H₄ (Po₄), George William Harris, Harry Adam Grine
Neutralization Of Free Acid (H₃P O₄) In Commercial Mono-Calcium Phosphate (Ca H₄ (Po₄), George William Harris, Harry Adam Grine
Bachelors Theses
"The object of this thesis has been a systematic research based on the characteristic properties and reactions of mono-calcium phosphate, Ca H₄ (PO₄)₂, tending towards the development of a process for neutralizing the free phosphoric acid, H₃PO₄ formed during its manufacture"--page 1.
Design Of A Mill For A Cyanide Plant, Charles A. Fach
Design Of A Mill For A Cyanide Plant, Charles A. Fach
Bachelors Theses
"Object. Designing a mill, which according to my ideas, would be the best in practice. The machinery used in practice at the present time, is mostly old style. In this work of mine I have substituted a great deal of lately invented machinery which would give much better and quicker results than the machinery now used. Many ideas have come to me while working on this subject which I think would assist me in any further work on the subject"--page 1.
The Determination Of Aluminium, Victor Hugo Gottschalk
The Determination Of Aluminium, Victor Hugo Gottschalk
Masters Theses
No abstract provided.