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Articles 19171 - 19200 of 19224
Full-Text Articles in Entire DC Network
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 …
Crystallization Of Magmas, Norman L. Ohnsorg
Crystallization Of Magmas, Norman L. Ohnsorg
Bachelors Theses
"The object of this paper is to arrive at a better explanation of the segregation of magmatic solutions on cooling. In which magmas will be discussed from a chemical and metallurgical lien of reasoning, in showing why such minerals as apatite, magnetite, etc., having a comparatively low melting point, crystallize cut before feldspar and quartz, which have a comparatively high fusion point"--page 1.
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 …
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.
Milling At Cananea, Dibrell Pryor Hynes
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.
The Rollamo 1911, The University Of Missouri School Of Mines And Metallurgy
The Rollamo 1911, The University Of Missouri School Of Mines And Metallurgy
Yearbooks
No abstract provided.
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 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.
A Study Of The Electrical Resistance Of Coke, Gas-Carbon, And Kryptol Under Varying Conditions, Benton Franklin Murphy, Reuben Conrad Thompson
A Study Of The Electrical Resistance Of Coke, Gas-Carbon, And Kryptol Under Varying Conditions, Benton Franklin Murphy, Reuben Conrad Thompson
Bachelors Theses
"This thesis was undertaken to make a study of the resistance of coke, gas-carbon, and kryptol when used as resistors in the electric resistance furnace, which daily is becoming of increasing industrial importance. It would appear at first sight that the calculation and design of an electric resistance furnace would be an extremely simple problem, since the whole effect is the change of electrical energy into heat according to Joule's Law; but this is by no means the case, as the resistance of the resistor may change enormously during the run of the furnace. The great difficulty met with is …
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 …
The Rollamo 1910, The University Of Missouri School Of Mines And Metallurgy
The Rollamo 1910, The University Of Missouri School Of Mines And Metallurgy
Yearbooks
No abstract provided.
Reheating Compressed Air By Internal Combustion, Norman L. Ohnsorg
Reheating Compressed Air By Internal Combustion, Norman L. Ohnsorg
Professional Degree Theses
"The perfection of a reheater of high efficiency has been discussed and experimented upon for a period of time nearly as long as the application of compressed air itself. At the present time all the reheaters are by the external combustion of fuel as in the case of stoves or furnaces, where the air pipes are carried through the flames or is surrounded by steam pipes, or by some similar contrivance, all of which the heating efficiency of the fuel upon the compressed air is low, due to the great loss by radiation, and hot escaping gases. Reheating compressed air …
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.
Chemical Analyses Of Special Tool Steels, Elmer List
Chemical Analyses Of Special Tool Steels, Elmer List
Bachelors Theses
No abstract provided.
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.
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 …
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.
The Rollamo 1909, The University Of Missouri School Of Mines And Metallurgy
The Rollamo 1909, The University Of Missouri School Of Mines And Metallurgy
Yearbooks
No abstract provided.
Economic Investigation Of The Lignites Of The Dickinson, N.D. Area, Glenn Beckley Morgan
Economic Investigation Of The Lignites Of The Dickinson, N.D. Area, Glenn Beckley Morgan
Professional Degree Theses
No abstract provided.
The Relation Of The Composition Of A Mineral To Its Properties, Edwin Phelps Murray
The Relation Of The Composition Of A Mineral To Its Properties, Edwin Phelps Murray
Professional Degree Theses
"The attempt has been made to bring together and to classify the properties of minerals and to show that there is some simple qualitative relation between their composition and physical properties, or in other words, to show that minerals containing different percentages of a certain element will all have similar properties dependent upon the proportion of that element. Further investigation of this subject would be in determining the modifying influence of crystal form"--page 1.
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
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 Oil Industry Of The Coalinga Field, A. Emory Wishon
The Oil Industry Of The Coalinga Field, A. Emory Wishon
Bachelors Theses
No abstract provided.
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 Rollamo 1908, The University Of Missouri School Of Mines And Metallurgy
The Rollamo 1908, The University Of Missouri School Of Mines And Metallurgy
Yearbooks
No abstract provided.
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.
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.