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[Envelope, September 15, 1840]

Description: Envelope addressed to Charles B. Moore, Millright, Sherman (Texas) that has a post mark from McKinney, Texas, September 13. A note in the lower right corner says that it was read on September 25, 1840. Another note is on the lower left corner and it reads, "Care of Hall & Chapman."
Date: September 13, 1840
Creator: Moore, Henry S.
Partner: UNT Libraries Special Collections

[Letter from Willie McGee and Dinky McGee to Mary Ann Dodd Moore and Charles B. Moore, September 12, 1880]

Description: The first two pages are from Willie McGee to his aunt Mary Ann Dodd Moore. He primarily discusses his life at school. The last two pages are from Dinkie to her sister and brother-in-law Charles. She talks about her recent poor health. The envelope has a 3 cent postal stamp and is addressed to Mrs. Mary Moore, Melissa, Collin Co., Texas. A handwritten note on the front reads: " Willy + Dinky McGee; Received September 18th; 1880." A postal stamp on the front reads: "Gallatin, Tenn; Sept 14" and one on the back reads: "Melissa, Collin Co., Texas; Sep 18, 1880."
Date: September 13, 1880
Creator: McGee, Dinkie & McGee, Willie
Partner: UNT Libraries Special Collections

[Letter to Mary Moore and Friends,September 13, 1898]

Description: The letter mentions irrigation. The girls went to a show at the opera theater. Will's wife bed her head. She talks about being tired after walking. She mentions snow and she sent something to Texas. She saw 3 trains, but no Texans. She says that Linnet was being lazy and she tried to send off a letter. Linnet is going to wash their clothes. She talks about crops in Colorado and the different families she is related to. She visited a young apple orchard. She mentions the price of distilled water. She talks about food that they have enjoyed. She received a letter from Tom. They finally returned from their trip and she is sick.
Date: September 13, 1898
Partner: UNT Libraries Special Collections

[Wedding announcement for Helen Douthitt Horn and Charles Wickliffe Graves, September 30, 1906]

Description: A wedding announcement for the marriage of Helen Douthitt Horn, daughter of Mr. and Mrs. R. C. horn, to Mr. Charles Wickliffe Graves. The wedding was to be held on Sunday, September 13, 1906, at 12 o'clock, at the First Christian Church in McKinney, Texas. The newlywed couple would later take up residence in Hillsboro, Texas.
Date: September 13, 1906
Creator: Horn, Robert Cannon & Horn, Mrs. Robert Cannon
Partner: UNT Libraries Special Collections

Bibliography of Temperature Measurement: July 1960 to December 1962

Description: Report presenting 700 additional references to the field of temperature measurement as a supplement to NBS Monograph 27, "Bibliography of Temperature Measurement, January 1953 to June 1960" issued April 6, 1961. These references were collected from two general sources: Scientific and technical literature and government reports. The period covered is from July 1960 to December 1962 with some earlier references which were found later. The arrangement of material is the same as in Monograph 27.
Date: September 13, 1936
Creator: Halpern, Carl
Partner: UNT Libraries Government Documents Department

The Flow of a Compressible Fluid Past a Curved Surface

Description: "An iteration method is employed to obtain the flow of a compressible fluid past a curved surface. The first approximation which leads to the Prandtl-Glauert rule, is based on the assumption that the flow differs but little from a pure translation. The iteration process then consists in improving this first approximation in order that it will apply to a flow differing from pure translatory motion to a greater degree. The method fails when the Mach number of the undisturbed stream reaches unity but permits a transition from subsonic to supersonic conditions without the appearance of a compression shock" (p. 305).
Date: September 13, 1943
Creator: Kaplan, Carl
Partner: UNT Libraries Government Documents Department

Newsmap. Monday, September 13, 1943 : week of September 2 to September 9, 209th week of the war, 91st week of U.S. participation

Description: Front: Text describes action on various war fronts: Italy, Yugoslavia, Air offensive, Southwest Pacific, Russia. Maps show military activities in Eurasia and New Guinea near Salamaua with boxed text highlighting action. Photograph: A story of blood [American soldier receives a transfusion while lying on the street in Santa Agata, Sicily while townspeople look on]. Back: Something money can't buy - United States Army tradition! Illustration shows service ribbons of service medals. Text describes the purpose and conditions of award of service medals.
Date: September 13, 1943
Creator: [United States.] Army Orientation Course.
Partner: UNT Libraries Government Documents Department

Combustion efficiencies in hydrocarbon-air systems at reduced pressures

Description: Report presenting results obtained with quiescent fuel-air mixtures and with small diffusion flames, which indicate that combustion efficiencies close to 100 percent were obtained at pressure much lower than those found in turbojet combustors at altitudes of 60,000 feet.
Date: September 13, 1950
Creator: Hibbard, Robert R.; Drell, Isadore L.; Metzler, Allen J. & Spakowski, Adolph E.
Partner: UNT Libraries Government Documents Department

Investigation of effects of inlet-air velocity distortion on performance of turbojet engine

Description: To determine effect of nonuniform inlet-air velocities, a full scale, axial-flow turbojet engine was investigated in Lewis altitude wind tunnel at altitudes from 20,000 to 50,000 feet, 0.21 flight Mach number and corrected engine speeds from 77.3 percent of rated speed to rated speed. Total-pressure variations as large as 103 pounds per square foot in radial direction and 90 pounds per square foot in circumferential direction at 30,000 feet were obtained. With the distortions investigated, net thrust varied between 0.95 and 1.03 of the thrust with uniform inlet-air distribution. Similarly the ratio of specific fuel consumption varied from 1.00 to 1.04. Within the arrange of this investigation the effects of nonuniform inlet velocity were not serious for the engine investigated.
Date: September 13, 1950
Creator: Conrad, E. William & Sobolewski, Adam E.
Partner: UNT Libraries Government Documents Department

Preliminary investigation of porous walls as a means of reducing tunnel boundary effects at low-supersonic Mach numbers

Description: Report presenting the use of porous-walled tunnels at supersonic Mach numbers as a means of avoiding reflection of a stream disturbance extending to the walls. Results from analysis and an experiment with a 4 degree wedge at a Mach number of 1.2 are provided.
Date: September 13, 1950
Creator: Nelson, William J. & Bloetscher, Frederick
Partner: UNT Libraries Government Documents Department

Force and pressure characteristics for a series of nose inlets at Mach numbers from 1.59 to 1.99 5: analysis and comparison on basis of ram-jet aircraft range and operational characteristics

Description: Performance of four experimentally investigated axially symmetric spike-type nose inlets is compared on basis of ram-jet-engine aircraft range and operational problems. At design conditions, calculated peak engine efficiencies varied 25 percent from the highest value which indicates importance of inlet design. Calculations for a typical supersonic aircraft indicate possible increase in range if engine is flown at moderate angle of attack and result in engine lift utilized. For engines with fixed exhaust nozzle, propulsive thrust increases with increasing heat addition in subcritical flow region in spite of increasing additive drag. For the perforated inlet there is a range of increasing total-temperature ratios in subcritical flow region that does not yield an increase in propulsive thrust. Effects of inlet characteristics on speed stability of a typical aircraft for three types of fuel control is discussed.
Date: September 13, 1951
Creator: Howard, E.; Luidens, R. W. & Allen, J. L.
Partner: UNT Libraries Government Documents Department

Lift, drag, and pitching moment of low-aspect-ratio wings at subsonic and supersonic speeds : plane triangular wing of aspect ratio 3 with NACA 0003-63 section

Description: Report presenting a wing-body combination with a plane triangular wing of aspect ratio 3 and NACA 0003-63 sections in streamwise planes at subsonic and supersonic Mach numbers. Lift, drag, and pitching moment are presented for a range of Mach and Reynolds numbers.
Date: September 13, 1951
Creator: Heitmeyer, John C.
Partner: UNT Libraries Government Documents Department

[News Clip: Cancer conference]

Description: Video footage from the WBAP-TV television station in Fort Worth, Texas, to accompany a news story about the fifth annual Southwest Cancer Conference.
Date: September 13, 1951
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

[News Clip: Football]

Description: Video footage from the WBAP-TV television station in Fort Worth, Texas, to accompany a news story about the football game between Woodrow Wilson and Highland Park at Dal-Hi stadium.
Date: September 13, 1951
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

[News Clip: Trapped man]

Description: Video footage from the WBAP-TV television station in Fort Worth, Texas, to accompany a news story about a fatal accident in a downtown parking garage.
Date: September 13, 1951, 6:45 p.m.
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

[News Script: Football]

Description: Script from the WBAP-TV station in Fort Worth, Texas, covering a news story about the football game between Woodrow Wilson and Highland Park at Dal-Hi stadium.
Date: September 13, 1951
Creator: WBAP-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections