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Articles 39241 - 39270 of 40197
Full-Text Articles in Physical Sciences and Mathematics
Studies Of Tempering Behavior Of Steel X-9165 Of N-A-X 9100 Series, James A. Ndulue
Studies Of Tempering Behavior Of Steel X-9165 Of N-A-X 9100 Series, James A. Ndulue
Bachelors Theses and Reports, 1928 - 1970
One of the reasons why steel is the most versatile of all the metals available for engineering applications is because of the wide range of properties that can be obtained from it by proper heat treatment.
Geology Of The Marget Ann Mine Butte District, Montana, Winston Martin Sahinen
Geology Of The Marget Ann Mine Butte District, Montana, Winston Martin Sahinen
Bachelors Theses and Reports, 1928 - 1970
As the field work progressed it became apparent that very little was known of the mineralogical associations of the precious metal constituents of the Marget Ann ore. A mineralogical study in excess of that originally planned was then decided upon to determine the affiliations exhibited by the silver and gold. With these objectives in mind, the laboratory and field work continued.
Polarographic Determination Of Germanium, Calvin Leo Stevenson
Polarographic Determination Of Germanium, Calvin Leo Stevenson
Bachelors Theses and Reports, 1928 - 1970
In the past germanium has been determined by either wet methods or by the spectograph; the spectograph being used for the determination of very small amounts of germanium and wet methods used when more than one hundredth of one percent germanium is present. Both of these analytical schemes have weaknesses.
Fluorite Deposits In The Dry Creek District, Near Superior, Mineral County, Montana, Russell M. Corn
Fluorite Deposits In The Dry Creek District, Near Superior, Mineral County, Montana, Russell M. Corn
Bachelors Theses and Reports, 1928 - 1970
Fluorite was discovered in the. Dry Creek District, Mineral County, in 1943 and the first commercial production of this mineral in Montana waS recorded from this locality.
Concentration Of Tungsten Ore From The Potosi Mining District, Ted S. Jordan
Concentration Of Tungsten Ore From The Potosi Mining District, Ted S. Jordan
Bachelors Theses and Reports, 1928 - 1970
Tungsten is a strategic metal which, at present, is in short supply in the United States. In addition to its need in the defense effort, tungsten is becoming more and more in industrial demand and, as an increasing number of uses for this element are being found, so must additional sources of it be discovered and processed.
Recrystallization Of High Purity Aluminum, Virgil H. Griswold Jr.
Recrystallization Of High Purity Aluminum, Virgil H. Griswold Jr.
Bachelors Theses and Reports, 1928 - 1970
If a metal is first cold-worked and then heated to a sufficient temperature for an adequate length of time, the hardening properties due to cold-working disappear, and the metal will return more or less to its original state. Upon examination of the microstructure, we find that new grains have replaced the old grains through what is called recrystallization. The final size of the recrystallized grains depends upon three important variables--the degree of cold-work or deformation, annealing temperature, and annealing time.
A Study Of The Effects Of The Chloride Ion On The Lead-Silver Anodes And On The Lead Tenor Of The Zinc Deposit In Zinc Electrolysis, William A. Mitchell
A Study Of The Effects Of The Chloride Ion On The Lead-Silver Anodes And On The Lead Tenor Of The Zinc Deposit In Zinc Electrolysis, William A. Mitchell
Bachelors Theses and Reports, 1928 - 1970
The electrolyte used in the commercial production of electrolytic zinc from zinc sulphate solutions contains small amounts of impurities each of which has its own effects upon the process. Impurities such as antimony, cobalt, nickel, and iron tend to lower the current efficiency while other impurities such as chlorine, fluorine, and nitrates tend to increase the corrosion of the lead anodes and thereby increase the lead tenor of the zinc deposit.
The Effect Of Germanium On The Current Efficiency In The Electrolysis Of Pure Zinc Sulfate Solution, Keith R. Bock
The Effect Of Germanium On The Current Efficiency In The Electrolysis Of Pure Zinc Sulfate Solution, Keith R. Bock
Bachelors Theses and Reports, 1928 - 1970
It has long been recognized that electrolytic zinc cells are extremely sensitive to impurities. In fact, certain impurities present in amounts as low as 0.1 mg/1 cause a serious loss of current efficiency. Also, the presence of several impurities in the electrolyte may accelerate the detrimental effect of each impurity.
The Decomposition Of Calcium Tungstate And Synthetic Scheelite With Hydrochloric Acid, Robert R. Beebe
The Decomposition Of Calcium Tungstate And Synthetic Scheelite With Hydrochloric Acid, Robert R. Beebe
Bachelors Theses and Reports, 1928 - 1970
The decomposition of scheelite with hydrochloric acid was studied under conditions of variable acid concentration, time and temperature. The reactions were traced by weighing material untransformed and, in some cases, by analyzing the transformation products.
The Precipitation Of Calcium Tungstate From Sodium Tungstate Solution, Martin E. Messner
The Precipitation Of Calcium Tungstate From Sodium Tungstate Solution, Martin E. Messner
Bachelors Theses and Reports, 1928 - 1970
In view of the great need for tungsten in the present industrial world it is necessary that all known tungsten sourves be utilized to the greatest possible extent. Scheelite ores promise to be an increasingly important source of tungsten, inasmuch as the discovery of vast new deposits has been made and known deposits of high grade ores have practically been depleted.
Metal Dust Production, James H. Foreman
Metal Dust Production, James H. Foreman
Bachelors Theses and Reports, 1928 - 1970
The object of this thesis is to study the production of metal dust by direct application of a mechanical force to a stream of molten metal.
The Indium-Mercury Constitutional Diagram, Bert E. Lake
The Indium-Mercury Constitutional Diagram, Bert E. Lake
Bachelors Theses and Reports, 1928 - 1970
Whenever metals differ greatly in electropositivity, intermetallic compounds are likely to form in preference to solid solutions. 21ercury and indium show a considerable difference in electropositivity. This would indicate that intermetallic compounds may play an important role in the constitutional diagram for the mercury-indium system.
The Effect Of Manganese On The Age Hardening Of Aluminum-Copper Alloys, Keith P. Burgess
The Effect Of Manganese On The Age Hardening Of Aluminum-Copper Alloys, Keith P. Burgess
Bachelors Theses and Reports, 1928 - 1970
It is known that age-hardening occurs in alloys of the solid solution type containing a hardening constituent, of a metal or metallic compound which is more soluble in the solvent phase at higher tempertures than at lower temperatures.
A Study Of The Beneficiation Of Low-Grade Domestic Chromite, Darrell Edward Bodie
A Study Of The Beneficiation Of Low-Grade Domestic Chromite, Darrell Edward Bodie
Bachelors Theses and Reports, 1928 - 1970
Chromite, a strategic mineral, is being consumed in ever increasing quantities in the United States today. Although the United States imports practically all of the chromite that is being consumed, it is gradually becoming necessary to exploit the low-grade deposits that are located within the United States, and also the low-grade deposits of Canada.
The Benefication Of A Low-Grade, Montana Scheelite Ore, Walter G. Parker
The Benefication Of A Low-Grade, Montana Scheelite Ore, Walter G. Parker
Bachelors Theses and Reports, 1928 - 1970
The increasing importance of tungsten as an industrial metal and the recent discoveries of extensive deposits of low-grade tungsten ores in Montana led to the investigation which is reported in this paper. The purpose of this investigation was to determine if a saleable concentrate could be obtained from one of these low-grade, Montana scheelite ores.
A Petrographic Analysis Of The Basal Member Of The Kootenai Formation, Frank E. Coupal
A Petrographic Analysis Of The Basal Member Of The Kootenai Formation, Frank E. Coupal
Bachelors Theses and Reports, 1928 - 1970
The basal member of the Kootenai formation in southwestern Montana is typically a fine to medium-grained "salt and pepper" sandstone and chert-pebble conglomerate. The section between Delpine, Montana, and Melrose, Montana, generally thickens and markedly coarsens to the West.
Test 491: Mccormick Super W-4, Nebraska Tractor Test Lab
Test 491: Mccormick Super W-4, Nebraska Tractor Test Lab
Nebraska Tractor Tests
This report and any related files are made available to the online through the Lester F. Larsen Tractor Test and Power Museum as resources allow. Established in 1998, this museum is located on the University of Nebraska-Lincoln East Campus. It is and appropriately housed within the walls of the historic 1920 Nebraska Tractor Test Laboratory, where the first tractor test was started on March 31st, 1920. Because the pioneer tests became worldwide standards, this location was designated as a Historic Landmark of Agricultural Engineering by the American Society of Agricultural Engineers in 1980, shortly after testing was moved to a …
Test 492: Farmall Super H, Nebraska Tractor Test Lab
Test 492: Farmall Super H, Nebraska Tractor Test Lab
Nebraska Tractor Tests
This report and any related files are made available to the online through the Lester F. Larsen Tractor Test and Power Museum as resources allow. Established in 1998, this museum is located on the University of Nebraska-Lincoln East Campus. It is and appropriately housed within the walls of the historic 1920 Nebraska Tractor Test Laboratory, where the first tractor test was started on March 31st, 1920. Because the pioneer tests became worldwide standards, this location was designated as a Historic Landmark of Agricultural Engineering by the American Society of Agricultural Engineers in 1980, shortly after testing was moved to a …
Test 490: John Deere Model 60 (All Fuel), Nebraska Tractor Test Lab
Test 490: John Deere Model 60 (All Fuel), Nebraska Tractor Test Lab
Nebraska Tractor Tests
This report and any related files are made available to the online through the Lester F. Larsen Tractor Test and Power Museum as resources allow. Established in 1998, this museum is located on the University of Nebraska-Lincoln East Campus. It is and appropriately housed within the walls of the historic 1920 Nebraska Tractor Test Laboratory, where the first tractor test was started on March 31st, 1920. Because the pioneer tests became worldwide standards, this location was designated as a Historic Landmark of Agricultural Engineering by the American Society of Agricultural Engineers in 1980, shortly after testing was moved to a …
Oil Shales In Montana, Richard N. Miller
Oil Shales In Montana, Richard N. Miller
Bachelors Theses and Reports, 1928 - 1970
Montana has long been known to have very large resources of coal and oil, and undetermined amounts of oil shale. The reserves of coal and oil have been proven, in part, and have been produced commercially, but not much is known about the extent and apparent value of the oil shales. Under present .conditions, and according to standards set by the United States Bureau of Mines, the shales are not of commercial value. They are, however, a potentially valuable mineral resource, and portions of them will possibly be utilized, although not in the near future.
Test 490: John Deere 60 All-Fuel, Nebraska Tractor Test Lab
Test 490: John Deere 60 All-Fuel, Nebraska Tractor Test Lab
Nebraska Tractor Tests
EXPLANATION OF TEST REPORT: John Deere John Deere 60 All-Fuel
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 …
Advertising Brochure: Case Si, Nebraska Tractor Test Lab
Advertising Brochure: Case Si, Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
Test 514: John Deere 70 Lpg, Nebraska Tractor Test Lab
Test 514: John Deere 70 Lpg, Nebraska Tractor Test Lab
Nebraska Tractor Tests
EXPLANATION OF TEST REPORT: John Deere 70 LPG 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 513: John Deere 60 Lpg, Nebraska Tractor Test Lab
Test 513: John Deere 60 Lpg, Nebraska Tractor Test Lab
Nebraska Tractor Tests
EXPLANATION OF TEST REPORT: John Deere 60 LPG 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 …
Parts Catalogue: Case Va, Nebraska Tractor Test Lab
Parts Catalogue: Case Va, Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
Parts Catalogue: Case Vai, Nebraska Tractor Test Lab
Parts Catalogue: Case Vai, Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
Test 489: Oliver Oc-18, Nebraska Tractor Test Lab
Test 489: Oliver Oc-18, Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
Test 488: Cockshutt Model 50, Nebraska Tractor Test Lab
Test 488: Cockshutt Model 50, Nebraska Tractor Test Lab
Nebraska Tractor Tests
This report and any related files are made available to the online through the Lester F. Larsen Tractor Test and Power Museum as resources allow. Established in 1998, this museum is located on the University of Nebraska-Lincoln East Campus. It is and appropriately housed within the walls of the historic 1920 Nebraska Tractor Test Laboratory, where the first tractor test was started on March 31st, 1920. Because the pioneer tests became worldwide standards, this location was designated as a Historic Landmark of Agricultural Engineering by the American Society of Agricultural Engineers in 1980, shortly after testing was moved to a …
Test 487: Cockshutt 50*, Nebraska Tractor Test Lab
Test 487: Cockshutt 50*, Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
Test 486: John Deere 50, Nebraska Tractor Test Lab
Test 486: John Deere 50, Nebraska Tractor Test Lab
Nebraska Tractor Tests
EXPLANATION OF TEST REPORT: John Deere 50 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 …