Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Physical Sciences and Mathematics

Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 118681 - 118710 of 119474

Full-Text Articles in Entire DC Network

Pegmatites In Southwestern Montana, Ora Rostad May 1941

Pegmatites In Southwestern Montana, Ora Rostad

Bachelors Theses and Reports, 1928 - 1970

Little has been written on pegmatites in Montana except in conjunction with reports on mining districts. This subject was chosen as a senior thesis to see what facts could be ascertained re­garding pegmatites alone, and an attempt has been made by the writer to assemble all written material on pegmatites in southwestern Montana, and to study specimens from those that could be reached or from which specimens were available.


A Study Of The Concentration Of A Low-Grade Manganese Ore From The Ennis District, John B. Schuettenhelm May 1941

A Study Of The Concentration Of A Low-Grade Manganese Ore From The Ennis District, John B. Schuettenhelm

Bachelors Theses and Reports, 1928 - 1970

The purpose of the investigation was to determine the most effective means of concentrating the manganese in the ore. The study was that of identification of the minerals present. This showed the presence of oxides of manganese and iron, and carbonates of calcium and manganese. Methods of investigation were planned to determined whether the ore could be concentrated effectively by gravity concentration methods. ­


The Monadnock Volume 15, Number 2, May 1941, Clark University Geographical Society May 1941

The Monadnock Volume 15, Number 2, May 1941, Clark University Geographical Society

The Monadnock (Clark Geographical Society)

Volume 15, Issue 2 of The Monadnock. The Monadnock was the alumni magazine of the Clark University Geographical Society (1927-1985) (2014-present).


Concrete And Cement Surface Coatings, Gabriel J. Popovich May 1941

Concrete And Cement Surface Coatings, Gabriel J. Popovich

Bachelors’ Theses

It has been with difficulty that precise information of any kind regarding the surface coating of concrete and cement finishes had been found. In fact, there was limited information to be found after 1930. Having but a short time to conduct any research, it was impossible to delve too deeply into this branch of the thesis. It is sincerely hoped that in the very near future a more thorough, extensive and comprehensive study can be made on this subject. The purpose of this thesis is to determine the best composition of concrete and the best surface coating for it and …


Families Of Circles, Mary Olive Norman May 1941

Families Of Circles, Mary Olive Norman

Bachelors’ Theses

No abstract provided.


Melting Point Studies Of Binary Mixtures Of Barbowax 4000 And 1500 And Various Waxes In An Air Chamber, Arnold P. Feider May 1941

Melting Point Studies Of Binary Mixtures Of Barbowax 4000 And 1500 And Various Waxes In An Air Chamber, Arnold P. Feider

Bachelors’ Theses

While selecting the subject of research for this thesis the author had the opportunity to consult several thesis conducted at Marquette University on the melting points of waxes.


The Corrosive Effect Of Sodium Acid Sulfite Solution Upon Stainless Steel As Compared With Carbon Steel And Cast Iron, Arthur John Haug May 1941

The Corrosive Effect Of Sodium Acid Sulfite Solution Upon Stainless Steel As Compared With Carbon Steel And Cast Iron, Arthur John Haug

Bachelors’ Theses

Tilghman, in 1866, discovered the fundamental principle of the sulfite process - the treatment of wood with a solution of sulfur dioxide gas in water, with the addition of an alkaline bisulfite. However, he was un­able to pursue this discovery because of the difficulty of obtaining acid resisting materials.


Zinc Relationships Of Some Utah Soils, Wilford Derby Laws Jr. May 1941

Zinc Relationships Of Some Utah Soils, Wilford Derby Laws Jr.

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Recent reports from many parts of the United States indicate that the so-called zinc-deficiency disease is wide spread. It affects some varieties of trees in some areas and all varieties in other areas, and occurs from Florida westward to the Pacific coast and northward to the Canadian line. Although the disease is more prevalent in trees, it is also known to affect annual plants.

A recent survey of Utah orchards shows a wide-spread occurrence of little-leaf, a zinc deficiency disease, in fruit trees. The disease was found to be common on the upper sandy soils between Ogden and Salt Lake …


Front Matter Apr 1941

Front Matter

Journal of the Minnesota Academy of Science

No abstract provided.


Base Exchange Properties Of Synthetic Resins, Edgar L. Piret, Robert W. Carlson Apr 1941

Base Exchange Properties Of Synthetic Resins, Edgar L. Piret, Robert W. Carlson

Journal of the Minnesota Academy of Science

No abstract provided.


Back Matter Apr 1941

Back Matter

Journal of the Minnesota Academy of Science

No abstract provided.


A Study Of A Carbonaceous Gold Ore, James S. Huckaba Jan 1941

A Study Of A Carbonaceous Gold Ore, James S. Huckaba

Bachelors Theses and Reports, 1928 - 1970

The presence of graphite in the ore of the Missouri-McKee Mine has made its treatment by the methods now used quite unsatisfactory. The study was undertaken to de­velop a new flow sheet which would give a high recovery and yet be economical enough to handle low grade material.


Geology Of Holmes And Washington Counties, Florida., Robert O. Vernon Jan 1941

Geology Of Holmes And Washington Counties, Florida., Robert O. Vernon

LSU Historical Dissertations and Theses

No abstract provided.


Test 374: Caterpiller Model D-6 (Diesel), Nebraska Tractor Test Lab Jan 1941

Test 374: Caterpiller Model D-6 (Diesel), Nebraska Tractor Test Lab

Nebraska Tractor Tests

All tractors tested at the Nebraska Tractor Test Laboratory were certified by their manufacturers as being stock model machines, conforming to specifications filed with the application for test. No special or high-test fuels were used except as recommended by the manufacturer as necessary.

All results within the official tractor test report were actually attained in tests and are without correction or allowances for friction, temperature, altitude, etc. The results were initially accomplished with the tractor in charge of skilled operators employed by the University.

Unless otherwise noted, each tractor was apparently in good condition at the end of the testing …


Test 378: John Deere Ar, Nebraska Tractor Test Lab Jan 1941

Test 378: John Deere Ar, Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT: John Deere AR

TEST A: The manufacturer's representative operates the tractor for a minimum of 12 hours using light to heavy drawbar loads in each gear.

This serves as a period for limber up, general observation and adjustments. Adjustments that are permissible include valve tappet clearance, breaker ,point gap, spark plug gaps, clutch and others of a similar nature. No new parts or accessories can be installed without having mention made of it in the report. No data' are recorded during this preliminary run except the time that the engine is operated.

BELT HORSEPOWER TESTS

TEST …


Test 367: Case Model Sc (Distillate), Nebraska Tractor Test Lab Jan 1941

Test 367: Case Model Sc (Distillate), Nebraska Tractor Test Lab

Nebraska Tractor Tests

All tractors tested at the Nebraska Tractor Test Laboratory were certified by their manufacturers as being stock model machines, conforming to specifications filed with the application for test. No special or high-test fuels were used except as recommended by the manufacturer as necessary.

All results within the official tractor test report were actually attained in tests and are without correction or allowances for friction, temperature, altitude, etc. The results were initially accomplished with the tractor in charge of skilled operators employed by the University.

Unless otherwise noted, each tractor was apparently in good condition at the end of the testing …


Test 368: Mccormick-Deering Farmall Model Md (Diesel), Nebraska Tractor Test Lab Jan 1941

Test 368: Mccormick-Deering Farmall Model Md (Diesel), Nebraska Tractor Test Lab

Nebraska Tractor Tests

All tractors tested at the Nebraska Tractor Test Laboratory were certified by their manufacturers as being stock model machines, conforming to specifications filed with the application for test. No special or high-test fuels were used except as recommended by the manufacturer as necessary.

All results within the official tractor test report were actually attained in tests and are without correction or allowances for friction, temperature, altitude, etc. The results were initially accomplished with the tractor in charge of skilled operators employed by the University.

Unless otherwise noted, each tractor was apparently in good condition at the end of the testing …


Test 371: Mccormick-Deering Model W-9 (Distillate), Nebraska Tractor Test Lab Jan 1941

Test 371: Mccormick-Deering Model W-9 (Distillate), Nebraska Tractor Test Lab

Nebraska Tractor Tests

All tractors tested at the Nebraska Tractor Test Laboratory were certified by their manufacturers as being stock model machines, conforming to specifications filed with the application for test. No special or high-test fuels were used except as recommended by the manufacturer as necessary.

All results within the official tractor test report were actually attained in tests and are without correction or allowances for friction, temperature, altitude, etc. The results were initially accomplished with the tractor in charge of skilled operators employed by the University.

Unless otherwise noted, each tractor was apparently in good condition at the end of the testing …


Test 376: Massey-Harris Model 81-R, Nebraska Tractor Test Lab Jan 1941

Test 376: Massey-Harris Model 81-R, Nebraska Tractor Test Lab

Nebraska Tractor Tests

All tractors tested at the Nebraska Tractor Test Laboratory were certified by their manufacturers as being stock model machines, conforming to specifications filed with the application for test. No special or high-test fuels were used except as recommended by the manufacturer as necessary.

All results within the official tractor test report were actually attained in tests and are without correction or allowances for friction, temperature, altitude, etc. The results were initially accomplished with the tractor in charge of skilled operators employed by the University.

Unless otherwise noted, each tractor was apparently in good condition at the end of the testing …


Advertising Brochure: Case Sc, Nebraska Tractor Test Lab Jan 1941

Advertising Brochure: Case Sc, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.


Test 375: Oliver Row Crop 60 Hc, Nebraska Tractor Test Lab Jan 1941

Test 375: Oliver Row Crop 60 Hc, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.


Test 369: Mccormick-Deering Model W-9 (Gasoline), Nebraska Tractor Test Lab Jan 1941

Test 369: Mccormick-Deering Model W-9 (Gasoline), Nebraska Tractor Test Lab

Nebraska Tractor Tests

All tractors tested at the Nebraska Tractor Test Laboratory were certified by their manufacturers as being stock model machines, conforming to specifications filed with the application for test. No special or high-test fuels were used except as recommended by the manufacturer as necessary.

All results within the official tractor test report were actually attained in tests and are without correction or allowances for friction, temperature, altitude, etc. The results were initially accomplished with the tractor in charge of skilled operators employed by the University.

Unless otherwise noted, each tractor was apparently in good condition at the end of the testing …


Test 370: Mccormick-Deering Model Wd-9 (Diesel), Nebraska Tractor Test Lab Jan 1941

Test 370: Mccormick-Deering Model Wd-9 (Diesel), Nebraska Tractor Test Lab

Nebraska Tractor Tests

All tractors tested at the Nebraska Tractor Test Laboratory were certified by their manufacturers as being stock model machines, conforming to specifications filed with the application for test. No special or high-test fuels were used except as recommended by the manufacturer as necessary.

All results within the official tractor test report were actually attained in tests and are without correction or allowances for friction, temperature, altitude, etc. The results were initially accomplished with the tractor in charge of skilled operators employed by the University.

Unless otherwise noted, each tractor was apparently in good condition at the end of the testing …


Test 372: International Tractractor Model T-9 (Gasoline) (Wide Tread), Nebraska Tractor Test Lab Jan 1941

Test 372: International Tractractor Model T-9 (Gasoline) (Wide Tread), Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.


Test 377: Massey-Harris Model 101-R, Nebraska Tractor Test Lab Jan 1941

Test 377: Massey-Harris Model 101-R, Nebraska Tractor Test Lab

Nebraska Tractor Tests

All tractors tested at the Nebraska Tractor Test Laboratory were certified by their manufacturers as being stock model machines, conforming to specifications filed with the application for test. No special or high-test fuels were used except as recommended by the manufacturer as necessary.

All results within the official tractor test report were actually attained in tests and are without correction or allowances for friction, temperature, altitude, etc. The results were initially accomplished with the tractor in charge of skilled operators employed by the University.

Unless otherwise noted, each tractor was apparently in good condition at the end of the testing …


Test 373: John Deere La, Nebraska Tractor Test Lab Jan 1941

Test 373: John Deere La, Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT: John Deere LA

TEST A: The manufacturer's representative operates the tractor for a minimum of 12 hours using light to heavy drawbar loads in each gear.

This serves as a period for limber up, general observation and adjustments. Adjustments that are permissible include valve tappet clearance, breaker ,point gap, spark plug gaps, clutch and others of a similar nature. No new parts or accessories can be installed without having mention made of it in the report. No data' are recorded during this preliminary run except the time that the engine is operated.

BELT HORSEPOWER TESTS

TEST …


Test 366: John Deere B, Nebraska Tractor Test Lab Jan 1941

Test 366: John Deere B, Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT: John Deere B

TEST A: The manufacturer's representative operates the tractor for a minimum of 12 hours using light to heavy drawbar loads in each gear.

This serves as a period for limber up, general observation and adjustments. Adjustments that are permissible include valve tappet clearance, breaker ,point gap, spark plug gaps, clutch and others of a similar nature. No new parts or accessories can be installed without having mention made of it in the report. No data' are recorded during this preliminary run except the time that the engine is operated.

BELT HORSEPOWER TESTS

TEST …


Conodonts From The Marathon Basin, Brewster County, Texas, Roy William Graves Jr. Jan 1941

Conodonts From The Marathon Basin, Brewster County, Texas, Roy William Graves Jr.

Masters Theses

"Conodonts were discovered in the limestones of the Marathon region in the Big Bend country, Brewster County, Texas, as a result of field work during the summer of 1939. This was not the first known occurrence of these fossils from this region, however, as King earlier mentioned the occurrence of conodonts in siliceous shales of Devonian age. The discovery of conodonts in the Ordovician and Pennsylvanian limestones of the area had its inception in the attempt to determine whether the Dimple limestone (lower Pennsylvanian) or Maravillas limestone (upper Ordovician) was involved in a fault that was being mapped. These limestones …


Studies On The Quantitative Analysis Of Rhenium And Its Occurrence In The Products Of Molybdenite Processing, Walter Keith Dean Jan 1941

Studies On The Quantitative Analysis Of Rhenium And Its Occurrence In The Products Of Molybdenite Processing, Walter Keith Dean

Masters Theses

"There is at the present time no commercially developed source of the metal rhenium in the United States. Since this metal is known to exist in molybdenite, it was felt that a study of the products of the metallurgical processing of this mineral might reveal a source of rhenium that could e developed. The Climax Molybdenum Co. provided a number of samples from their smelter at Langloth, Pennsylvania. Although an improved method for the quantitative estimation of rhenium was recently published, its accuracy was not high and the procedure exacting and time-consuming. These combined factors led to the selection of …


The Removal Of Chlorides And Sulfates By Synthetic Resins., Lucille Grace Boudreaux Jan 1941

The Removal Of Chlorides And Sulfates By Synthetic Resins., Lucille Grace Boudreaux

LSU Historical Dissertations and Theses

No abstract provided.