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Articles 291751 - 291780 of 294440

Full-Text Articles in Physical Sciences and Mathematics

Status Of Tertiary Woods Of The Western States Representing The Juglandaceae, George F. Beck Apr 1944

Status Of Tertiary Woods Of The Western States Representing The Juglandaceae, George F. Beck

All Faculty Scholarship for the College of the Sciences

For many years there has been uncertainty concerning the generic status of some fossil leaves belonging without question to the walnut family as a whole. A review of the woods of Juglandaceae as they have appeared in Tertiary horizons of the western states has suggested which genera are present, and in what proportions their leaves (or other remains) might be expected to appear.

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Drought, Its Effects And Measures Of Control In Nebraska, G. E. Condra Apr 1944

Drought, Its Effects And Measures Of Control In Nebraska, G. E. Condra

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

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Fluorite Near Silver Bow, Montana, Charles V. Campbell Feb 1944

Fluorite Near Silver Bow, Montana, Charles V. Campbell

Bachelors Theses and Reports, 1928 - 1970

The wartime demand for fluorspar has caused renewed interest in fluorite deposits. Near Silver Bow, Montana, a deposit of massive, coarsely crystalline fluorspar, which has not been described in the literature, has attracted the atten­tion of the United States Geological Survey.

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The Incompatibility Of Certain Alcohol And Soap Frothers, John Thomas Doherty Feb 1944

The Incompatibility Of Certain Alcohol And Soap Frothers, John Thomas Doherty

Bachelors Theses and Reports, 1928 - 1970

The purpose of this thesis is to elucidate this phenomena of frother incompatibility, and to offer an explanation based upon several divergent lines of investigation. The research was limited to four common frothing agents, namely, pine oil, n-amyl alcohol, sodium oleate, and sodium lauryl sulphate (Dreft).

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Production Of Iron-Tin Compacts By Powder Metallurgy And A Synopsis Of Their Principle Properties, Matt C. Andrews Feb 1944

Production Of Iron-Tin Compacts By Powder Metallurgy And A Synopsis Of Their Principle Properties, Matt C. Andrews

Bachelors Theses and Reports, 1928 - 1970

This thesis is concerned primarily with the production of metal powder compacts of iron and tin. In producing these compacts, the effects of process­ing variables on some of the essential properties of the pellets made were investigated.

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Hardness And Electrical Resistivity Of Copper-Iron Powder Metal Compacts, Fred A. Foyle Jr. Feb 1944

Hardness And Electrical Resistivity Of Copper-Iron Powder Metal Compacts, Fred A. Foyle Jr.

Bachelors Theses and Reports, 1928 - 1970

Although powder metallurgical methods have been used for years to fabricate tungsten and platinum, very little scientific data have been recorded until the beginning of this century. A large percentage of all commercial production at present is based upon past practice rather than upon scientific knowledge.

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Methods Of Determining Porosity And Spatter Losses Of Arc Welds, Campbell W. F. Funk Feb 1944

Methods Of Determining Porosity And Spatter Losses Of Arc Welds, Campbell W. F. Funk

Bachelors Theses and Reports, 1928 - 1970

The original objective of this project was to determine the effect of varying current intensity and electrode coating composition upon the spatter losses and porosity of arc welds made by alternating current. This subject was suggested by the Welding Research Council of the Engineering Foundation, which is a clearing house for welding research in order to avoid du­plication of work.

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Age Hardening Of Copper Antimony Alloys, William R. Stern Feb 1944

Age Hardening Of Copper Antimony Alloys, William R. Stern

Bachelors Theses and Reports, 1928 - 1970

A large number of alloys of varying percentages of copper and antimony were prepared. These alloys were treated in various ways which might be expected to produce age hardening. The effect of cold working was studied in the range where the alloys were malleable.

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The Electrodeposition Of Iron-Manganese Alloys, Raymond D. Magorien Feb 1944

The Electrodeposition Of Iron-Manganese Alloys, Raymond D. Magorien

Bachelors Theses and Reports, 1928 - 1970

An electrodeposition of an iron-manganese alloy was made from the same conditions determined by previous re­search. Various addition agents were experimented with in an attempt to produce better conditions for electro-deposition. It was found advantageous to add small a­mounts of sodium lauryl sulfate and ammonium sulfite to the electrolyte.

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An Isopach Map And Discussion Of The Marine Jurassic Of Western United Sates And Canada, John H. Ferry Feb 1944

An Isopach Map And Discussion Of The Marine Jurassic Of Western United Sates And Canada, John H. Ferry

Bachelors Theses and Reports, 1928 - 1970

Recent demands for petroleum to carry on the war effort have resulted in widespread prospecting in the northern Great Plains. Nearly all oil wells now drilled are of a depth to penetrate the marine Jurassic formations. It is known that these strata differ in thickness from place to place, but information of distribution, thickness, and lithology has not yet been compiled.

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Torsional Deflection Of Miter-Type Lock Gates And Design Of The Diagonals, Edwin Gustav Hoffmann Feb 1944

Torsional Deflection Of Miter-Type Lock Gates And Design Of The Diagonals, Edwin Gustav Hoffmann

Retrospective Theses and Dissertations

No abstract provided.

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Abstract Papers Jan 1944

Abstract Papers

Journal of the Minnesota Academy of Science

No abstract provided.

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Making Beats Visible, Carl J. Ulrich Jan 1944

Making Beats Visible, Carl J. Ulrich

Journal of the Minnesota Academy of Science

No abstract provided.

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The Theory Of The Impulse Function For Oscillatory Mechanical And Electrical Systems, E. L. Hill Jan 1944

The Theory Of The Impulse Function For Oscillatory Mechanical And Electrical Systems, E. L. Hill

Journal of the Minnesota Academy of Science

No abstract provided.

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Some Emission Phenomena Observed On Commercial Photocells, Zaboj V. Harvalik Jan 1944

Some Emission Phenomena Observed On Commercial Photocells, Zaboj V. Harvalik

Journal of the Minnesota Academy of Science

No abstract provided.

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Electroplating Of Chromium Upon A Nickel Plated Magnesium Alloy, Harmel Dawson Jan 1944

Electroplating Of Chromium Upon A Nickel Plated Magnesium Alloy, Harmel Dawson

Bachelors Theses and Reports, 1928 - 1970

A nickel plating operation for magnesium alloys was investigated and proved successful in plating a small sample of a typical commercial magnesium alloy, Dowmetal J1.

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A Spectrophotometric Study Of The Solution Of Iodine In Aqueous Potassium Iodide, Joseph L. Schneider Jan 1944

A Spectrophotometric Study Of The Solution Of Iodine In Aqueous Potassium Iodide, Joseph L. Schneider

Master's Theses

No abstract provided.

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Censusing Pheasants By Detonations, H. Elliot Mcclure Jan 1944

Censusing Pheasants By Detonations, H. Elliot Mcclure

Nebraska Game and Parks Commission: Staff Research Publications

A study of the ecology and management of the ring-necked pheasant (Phasianus c. torquatus) was begun in Nebraska in the spring of 1941. Prime among the objectives of the survey was to devise some method by which the populations could be estimated or counted. In conjunction with roadside counts as practiced in Minnesota, Iowa, Ohio, Pennsylvania and other states, attempts were made to derive a closer estimate than by that method. Every game technician working with roadside counts of pheasants realizes the difficulties involved. Having had success in estimating the numbers of mourning doves by counting their calls …

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Aircraft Electronic Instrumentation, A. P. Upton Jan 1944

Aircraft Electronic Instrumentation, A. P. Upton

Journal of the Minnesota Academy of Science

No abstract provided.

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Abstract Papers Jan 1944

Abstract Papers

Journal of the Minnesota Academy of Science

No abstract provided.

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The Decomposition Of Isopropyl Chlorocarbonate., Edgar Lattimore Compere Jan 1944

The Decomposition Of Isopropyl Chlorocarbonate., Edgar Lattimore Compere

LSU Historical Dissertations and Theses

No abstract provided.

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A Study Of Deep-Seated Domes Of South Louisiana., William Edwin Wallace Jan 1944

A Study Of Deep-Seated Domes Of South Louisiana., William Edwin Wallace

LSU Historical Dissertations and Theses

No abstract provided.

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Geology Of Webster Parish., James Littell Martin Jan 1944

Geology Of Webster Parish., James Littell Martin

LSU Historical Dissertations and Theses

No abstract provided.

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The Determination Of Small Amounts Of Carbon Monoxide In Air, Edward J. Fitzsimons Jan 1944

The Determination Of Small Amounts Of Carbon Monoxide In Air, Edward J. Fitzsimons

Master's Theses

No abstract provided.

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Volume Tables For Connecticut Hardwoods, Walter H. Meyer, Raymond Kienholz Jan 1944

Volume Tables For Connecticut Hardwoods, Walter H. Meyer, Raymond Kienholz

Yale School of the Environment Bulletin Series

No abstract provided.

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Ground Water In The Republican River Basin In Nebraska- Part 1: Nuckolls, Webster, Franklin And Harlan Counties, H.A. Waite, E.C. Reed, D.S. Jones Jr. Jan 1944

Ground Water In The Republican River Basin In Nebraska- Part 1: Nuckolls, Webster, Franklin And Harlan Counties, H.A. Waite, E.C. Reed, D.S. Jones Jr.

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

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Spectrophotometric Determinations Of The Sulfonamides, Paul William Brna Jan 1944

Spectrophotometric Determinations Of The Sulfonamides, Paul William Brna

Master's Theses

No abstract provided.

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On Certain Arithmetical Functions Due To G. Humbert, M. A. Basoco Jan 1944

On Certain Arithmetical Functions Due To G. Humbert, M. A. Basoco

Department of Mathematics: Faculty Publications

G. Humbert has discussed, in a series of brief notes, a certain class of entire functions with interesting arithmetical properties. These functions are defined, in an essentially unique manner, by certain functional equations. The Fourier series representations of the solutions of these equations are similar in form to those for the elliptic functions snu, cnu, dnu, and so on. They differ from these, however, in that their domain of validity extends throughout the entire complex plane (Z∞ excluded) and moreover, in that their arithmetized forms involve incomplete numerical functions of the divisors of an integer.
In the …

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A Theorem On The Unit Groups Of Simple Algebras, Ralph Hull Jan 1944

A Theorem On The Unit Groups Of Simple Algebras, Ralph Hull

Department of Mathematics: Faculty Publications

Let k be an algebraic number field of finite degree m and let A be a normal simple algebra of degree n, order n2, over k. Our object is to prove the following theorem.
THEOREM. If A is an R-algebra, that is, if n>2 or at least one infinite prime place of k is unramified in A when n=2, then any two distinct maximal orders of A have distinct groups of units.

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Ground Water In The Republican River Basin- Part Ii: Furnas County, H.A. Waite, E.C. Reed, D.S. Jones Jr. Jan 1944

Ground Water In The Republican River Basin- Part Ii: Furnas County, H.A. Waite, E.C. Reed, D.S. Jones Jr.

Conservation and Survey Division: Faculty and Staff Publications

No abstract provided.

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