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Articles 68881 - 68910 of 69073
Full-Text Articles in Physical Sciences and Mathematics
A Study Of The Temperature Of The Vapor Above A Boiling Salt Solution, Leo Wilson Scott
A Study Of The Temperature Of The Vapor Above A Boiling Salt Solution, Leo Wilson Scott
Honors Theses
The problem of temperature of the vapor over a boiling salt solution, has attracted a great deal of interest in the past, due partly to the conflicting data to be had and to the apparent paradox in the statement of Michael Faraday "that the temperature of the vapor over a boiling solution was the same as it would be over the boiling pure solvent."
The Effect Of Amines On The Setting Time Of Silicic Acid Gels, Phillip Holmes Dewey
The Effect Of Amines On The Setting Time Of Silicic Acid Gels, Phillip Holmes Dewey
Honors Theses
It is known that when sodium silicate solution and an acid are mixed, a gel is sooner or later formed. The speed of gelation depends on a number of factors. The fundamental factors on which gelation depends are- (l) The concentration of water glass (2) The concentration of acid (3) Agitation (4) Temperature In this work, these four factors were kept as constant as possible. It is also known that the presence of NH3 considerably reduces the time of set. In this work, the effect of CH3 NH2, which is closely related to NH3, was studied. The effect of methyl …
Solubility Curves Of Various Commercial Waxes In Several Organic Solvents, Lawson Joseph Ford
Solubility Curves Of Various Commercial Waxes In Several Organic Solvents, Lawson Joseph Ford
Bachelors’ Theses
The introduction contained herein is- merely meant to acquaint the reader with the common waxes. The subject matter itself has been purposely condensed. For more detailed accounts references are made to well known authorities throughout.
The Fundamental Theorem Of Algebra, John D. Fitzpatrick
The Fundamental Theorem Of Algebra, John D. Fitzpatrick
Bachelors’ Theses
Algebra is indeed an interesting and intriguing field of knowledge. Many people fear and dread it, and yet what do they fear? Is not algebra a logical sequence of simple facts based perhaps on a few self-evident truths? If people saw the value of algebra, they would strive more enthusiastically to understand its principles. John Locke has a fitting commentary on those who are unfamiliar with algebra.
An Investigation Of The Thermo- And Action- Electric Properties Of Molybdenite, William Otis Johnson
An Investigation Of The Thermo- And Action- Electric Properties Of Molybdenite, William Otis Johnson
Master's Theses
Considerable work has been done on various mineral substances and chemical compounds within recent years to ascertain, if possible, whether the substance possessed any degree of photo- or thermos-sensitivity; and, to determine the characteristics of these responses. Among the most prominent substances which have been tested are selenium, bismuth, antimony, hematite, stibnite, and molybdenite. It was the purpose of this investigation to summarize the phenomena that have occurred within samples of molybdenite under a variety of conditions involving heat, light, and e.m.f.
Oval Curves, Leona G. Harner
Oval Curves, Leona G. Harner
Bachelors’ Theses
It has been the aim of the writer to present in this thesis a discussion of the most commonly known oval curves and their chief properties.
Continued Fractions, Alma Holmgren
Continued Fractions, Alma Holmgren
Bachelors’ Theses
The aim of this thesis is to give the reader a general idea of the two types of continued fractions -- the simple continued fractions and the general continued fractions. Some properties of each type are also included.
Remedial Work In Subtraction, Multiplication And Division, Margaret A. Fleming
Remedial Work In Subtraction, Multiplication And Division, Margaret A. Fleming
Bachelors’ Theses
The subject matter of this thesis is Remedial Work in Subtraction, Multiplication and Division of Whole Numbers. A class or 39 pupils, 15 girls and 24 boys were given the Compass Diagnostic Tests in Arithmetic in each or these three fundamentals.
Probability, The Historical Development Of The Theory And Its Application To Games Of Chance, Rose M. Brandt
Probability, The Historical Development Of The Theory And Its Application To Games Of Chance, Rose M. Brandt
Bachelors’ Theses
The theory of probability had its origin in isolated mathematical problems taken from games of chance. The beginnings of many of our modern theories and concepts can be traced back to Chinese origin. So too can the theory of probability. With the exception of the Chinese problem, dating from the beginning of the Christian era, no reference seems to have again been made to the theory prior to the latter part of the fifteenth century. In 1494 an Italian monk, Pacioli, was one of the first to introduce the "Problem of Points" into a treatise on mathematics. By the solution …
Paleontology Of The Upper Cretaceous Of Chaco Canyon, New Mexico, Richard Pickard Vann
Paleontology Of The Upper Cretaceous Of Chaco Canyon, New Mexico, Richard Pickard Vann
Earth and Planetary Sciences ETDs
It is the purpose of this paper to describe some Upper Cretaceous invertebrate fossils (including descriptions of an algal form, and some vertebrate teeth) collected by the writer in Chaco Canyon, New Mexico, and to give a brief summary of the physiography and stratigraphy of the region.
Some Results Of Magnetometric Surveying In Missouri, John Gustave Grohskopf
Some Results Of Magnetometric Surveying In Missouri, John Gustave Grohskopf
Masters Theses
"This thesis describes the results of a series of magnetic surveys carried on in the state of Missouri. The financial assistance required for the work was granted in the form of a fellowship to the author by the Industrial Club of the Industrial Bureau of St. Louis; Mr. George S. Smith, Director. Since the progress of any industrial center is accelerated by the mineral resources contiguous to it, the Industrial Club believed that further research upon known and also undeveloped mineral deposits might result in the development of them. It was decided that geophysical methods of research might show greater …
Studies In The Distribution Of Orbitolina Walnutensis Carsey, Shirley Alfred Lynch
Studies In The Distribution Of Orbitolina Walnutensis Carsey, Shirley Alfred Lynch
Masters Theses
"This paper has shown the stratigraphic and geographic range of the foraminifer, Orbitolina walnutesis Carsey. Samples from sections in thirteen counties in north and north central Texas have been studied. Many geologists have previously studied these sections in detail, correlation them and published the results"--Summary and Conclusions, page 73.
The Three-Point Gap As A Means Of Control In Instantaneous Photography, Elgin Albert Denio
The Three-Point Gap As A Means Of Control In Instantaneous Photography, Elgin Albert Denio
Master's Theses
In 1926, Wynn Williams investigated the theory of the three-point gap, which phenomenon had been known and utilized for some time but until his investigation was not understood theoretically. This investigation has been divided into two distinct parts: First, when the energy was generated by a large Toepler-Holtz station machine; and second when the energy was generated by a one-kilowatt, 25,000 volt transformer.
A Preliminary Study Of Electrical Conductivity In Silicic Acid Gels, Rudolph C. Ferguson
A Preliminary Study Of Electrical Conductivity In Silicic Acid Gels, Rudolph C. Ferguson
University of the Pacific Theses and Dissertations
In this project the author has attempted to determine the specific conductance of a gel of known composition; the changes, if any, of conductance in a gel as it sets; and the changes in conductance due to the diffusing of an electrolyte through the gel.
The Spinning Top, Aaron Jefferson Miles
The Spinning Top, Aaron Jefferson Miles
Masters Theses
"Several mathematicians have solved the problems of motion of the top and gyroscope most completely, but none of them have considered in their solutions the effects of the supporting gimbal rings upon the motion or the effects of a variable rotor speed. It is the purpose of this paper to investigate the top equations by two well known methods; namely, by the method of Lagrange and by the method of Jacobi; considering in both the dynamics of the gimbal rings and varying rotor speed"--Introduction, page 3.
Age Relationships Of Ore Deposits Of Southwestern Montana (A Microscopic Study), Charles R. Trueworthy
Age Relationships Of Ore Deposits Of Southwestern Montana (A Microscopic Study), Charles R. Trueworthy
Bachelors Theses and Reports, 1928 - 1970
Although considerable work has been undertaken by some prominent geologists, the best known of which is that of Paul Billingsley and J. A. Grimes', in investigating the ore deposits of the Boulder Batholith and surrounding area, there has not been any complete microscopic investigation of these deposits, as a whole, published in the literature. With this in mind it was suggested to the writer by Professor Paul A. Schafer, of the Montana School of Mines, that a microscopic study of the ores of this region would be a worthwhile geologic problem.
It was thought that the mineral association and the …
The Construction Of Conic Sections By Means Of Pascal's And Brianchon's Theorems, Benjamin Lee Welker Jr.
The Construction Of Conic Sections By Means Of Pascal's And Brianchon's Theorems, Benjamin Lee Welker Jr.
University of the Pacific Theses and Dissertations
The discovery of conic sections was made by Menaechmus (375-325 B.C.) an associate of Plato and a pupil of Eudoxus. This discovery, in the course of only a century, raised geometry to the loftiest height which it was destined to reach during antiquity.
Studies In The Diphenyl Series : The Motility Of The Chlorine Atoms On The Nuclei., Adolph Rebernak 1907-1990
Studies In The Diphenyl Series : The Motility Of The Chlorine Atoms On The Nuclei., Adolph Rebernak 1907-1990
Electronic Theses and Dissertations
No abstract provided.
A Bibliography Of The Theory Of Relativity, Ruth E. Richardson
A Bibliography Of The Theory Of Relativity, Ruth E. Richardson
University of the Pacific Theses and Dissertations
This thesis, a Bibliography of Relativity, has begun with a very meager knowledge of the amount of literature which has been written on the subject of relativity either s explanation or commentary. The project was to 11at all the books and periodical articles written on or about the subject Relativity which are on file in the libraries of the College of the Pacific, University of California and stanford up to and including the year 1920.
Studies In The Diphenyl Series : Monohydroxy Diphenyls., Elizabeth Kendrick Trawick 1908-1991
Studies In The Diphenyl Series : Monohydroxy Diphenyls., Elizabeth Kendrick Trawick 1908-1991
Electronic Theses and Dissertations
No abstract provided.
The Electro-Deposition Of The Binary System Copper-Cadmium., Allen Stratton Smith 1906-1966
The Electro-Deposition Of The Binary System Copper-Cadmium., Allen Stratton Smith 1906-1966
Electronic Theses and Dissertations
No abstract provided.
Reactions Between The Stannous And Arsenate Ions In Silicic Acid Gels, Willard Merle Farr
Reactions Between The Stannous And Arsenate Ions In Silicic Acid Gels, Willard Merle Farr
University of the Pacific Theses and Dissertations
Observation of crystal growths resulting from the chemical interaction of stannous chloride and sodium arsenate in silicic acid gels revealed the following very interesting fact. Gels identical in every respect except acidity, contained crystal growths varying greatly in appearance.
The purpose of this investigation was, therefore, to allow stannous and arsenate ion to combine in a series of accurately prepared gels, identical in all respects except the acid content, and to observe the effect upon crystal growth of: (1) varying the acid concentration; and (2) varying the kind of acid
A Study Of An Objective Placement Examination For Sectioning College Physics Classes, John Milton Willson
A Study Of An Objective Placement Examination For Sectioning College Physics Classes, John Milton Willson
Masters Theses
"For several years the Department of Physics of the Missouri School of Mines has practiced sectioning of its classes in general physics. The aim has been to segregate in one section the students of superior ability, giving them a course including both the fundamentals of physics and their applications in engineering. The remainder are given a course in fundamentals without placing so much stress upon the applications...Another criterion used to supplement the first-year grade record is the student's score on the Iowa Placement Examinations. The physics examination consists of two parts, the Training Series and the Aptitude Series. These examinations …
A Preliminary Study Of The Separation Of The Copper Sulfides From Sphalerite And The Effect Of Certain Reagents On Some Of The Pure Copper Minerals In Synthetic Mixtures, Gailen T. Vandel
Bachelors Theses and Reports, 1928 - 1970
The problem of separating the copper sulfide minerals from sphalerite, in copper - zinc ores, has been a difficult one. This is largely due to the lack of adequate research and the small amount of data obtainable on the behavior of copper and zinc sulfide minerals in flotation circuits.
The Geology And Petrography Of A Portion Of Marlboro And Brattleboro Townships, Windham County, Vermont, Elizabeth Putnam Richards
The Geology And Petrography Of A Portion Of Marlboro And Brattleboro Townships, Windham County, Vermont, Elizabeth Putnam Richards
Honors Papers
Location and area. The territory covered in this report is a roughly rectangular area of about fifty square miles. It is situated partly in Marlboro and partly in Brattleboro township, in Windham county, southeastern Vermont. It runs from 42° 50' to 42° 55' north latitude and from 72° 37' to 72° 47' west longitude. Geologically the region is a part of the Green Mountains while physiographically the area is in the New England Upland section.
Statement of the Problem and Methods. The origin, history and correlation of the country rock of the region is the particular problem with which this …
Geology And Acid Intrusions Of Marlboro Township, Vermont, Stanley Gordon Elder
Geology And Acid Intrusions Of Marlboro Township, Vermont, Stanley Gordon Elder
Honors Papers
It is the aim of this paper to examine the mineralization resulting from the intrusion of acid dikes and veins into the schists of Marlboro township, Vermont, and to give a brief account of the geology of the area.
The problem of mineralization in southern Vermont is one which has been treated very slightly and is one which is deserving of more study than it has received. This problem results from the presence of numerous acid igneous masses in all the formation of the region. Petrographic research in the igneous intrusions was done partially with the hope that the study …
A Study Of The Miscibility Of Various Liquids With Ethylene Glycol, Joseph J. Furlong
A Study Of The Miscibility Of Various Liquids With Ethylene Glycol, Joseph J. Furlong
Bachelors’ Theses
Ethylene glycol is a compound possessing great interest, both from a theoretical and a practical standpoint. In its properties it lies midway between ethyl alcohol, C2H50H, and glycerol, C3H5(0H)3, the three compounds together forming an homologous series of alcohols.
A few years ago this substance was a scientific curiosity, produced solely by laboratory methods, and without any commercial value, although it had been known for more than sixty years. Today the manufacturers cannot produce enough glycol to satisfy the growing demand. The DuPont organization wanted to use it in a …
A Study Of Halowas Oil In Reference To Its Properties And Uses, Joseph F. Hoffman
A Study Of Halowas Oil In Reference To Its Properties And Uses, Joseph F. Hoffman
Bachelors’ Theses
Halowax oil, specific gravity 1.25, is a thinly fluid mobile liquid, almost colorless, having a characteristic odor which is not unpleasant, heavy, or persistent. It is manufactured by the Halowax Corporation, a division or the Bakelite Corporation, at Wyandotte, Michigan.
The Development Of Colloid Chemistry, Oscar A. Bouise
The Development Of Colloid Chemistry, Oscar A. Bouise
Electronic Thesis and Dissertation
At first, it was a blur, that had shrouded a great mystery for ages and ages, until some seventy odd years ago. Then came Thomas Graham, who could not satisfy himself with merely viewing a blur as a blur. Being a scientist, he applied his mind experimentally, with the keen precision of any of the eminent astronomers using a telescope, and viewed more clearly this mist which hovered above the horizon . But maybe it was not due time fir the unfolding of the great secret, for Graham's focus only revealed a more complicated mist that had been seen before. …
The Development Of Colloid Chemistry, Oscar A. Bouise
The Development Of Colloid Chemistry, Oscar A. Bouise
Electronic Thesis and Dissertation
At first, it was as a blur, that had shrouded a great mystery for ages and ages, until some seventy odd years ago. Then came Thomas Graham, who could not satisfy himself with merely viewing a blur as a blur. Being a scientist, he applied his mind experimentally, which the keen precision of any of the eminent astronomers using a telescope, and viewed more clearly this mist which hovered above the horizon.