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Dahlias for the Home.

Description: Discusses the appeal of dahlias; describes the different varieties and how to grow them successfully at home.
Date: November 1923
Creator: Morrison, B. Y. (Benjamin Yoe), 1891-1966
Partner: UNT Libraries Government Documents Department
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Meadows for the northern states.

Description: Describes the different varieties of clover, hay grasses, and regular grasses that are found in and best suited to meadow lands in the northeastern and midwestern United States; also explains methods of seeding and fertilizing.
Date: November 1920
Creator: Piper, Charles V. (Charles Vancouver), 1867-1926 & Carrier, Lyman
Partner: UNT Libraries Government Documents Department
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Drying crude drugs.

Description: Explains the fundamental principles of drying crude vegetable drugs. Provides drawings and instructions for constructing two types of driers.
Date: November 1921
Creator: Russell, G. A.
Partner: UNT Libraries Government Documents Department
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The hard red spring wheats.

Description: Describes the characteristics and varieties of hard red wheats that are sown in the spring in the north-central United States.
Date: November 1922
Creator: Clark, J. Allen (Jacob Allen), b. 1888 & Martin, John H. (John Holmes), 1893-
Partner: UNT Libraries Government Documents Department
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Anthracnose as a cause of red-clover failure in the southern part of the Clover Belt.

Description: Describes the characteristics of anthracnose, the damage it causes to red clover in the southern part of the Clover Belt, and methods of control; also discusses the development of strains of red clover resistant to anthracnose.
Date: November 1926
Creator: Pieters, A. J. & Monteith, John, 1893-
Partner: UNT Libraries Government Documents Department
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[Check for Drinking Fountain, November 22, 1921]

Description: Check from the Forestburg School Board to the Practical Drawing Company for $21.00; the memo line says "Drinking fount." The check is signed "Forestburg School brd., HB. Caddell, Sec." The back of the check has 3 stamps. One of the stamps is from Southwest National Bank in Dallas Texas, another stamp is from the Banking or Trust Company, dated November 28, 1921 also in Dallas. The third stamp is dated November 29.
Date: November 22, 1921
Creator: Forestburg School Board
Partner: UNT Libraries Special Collections
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Göttingen Wind Tunnel for Testing Aircraft Models

Description: Given here is a brief description of the Göttingen wind tunnel for the testing of aircraft models, preceded by a history of its development. Included are a number of diagrams illustrating, among other things, a sectional elevation of the wind tunnel, the pressure regulator, the entrance cone and method of supporting a model for simple drag tests, a three-component balance, and a propeller testing device, all of which are discussed in the text.
Date: November 1920
Creator: Prandtl, L.
Partner: UNT Libraries Government Documents Department
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Horizontal Buoyancy in Wind Tunnels

Description: Note presenting an examination of horizontal buoyancy in wind tunnels, including an examination of the relative flow, static pressure gradient, horizontal buoyancy computation, and methods of computation in practical use are provided.
Date: November 1920
Creator: Zahm, A. F.
Partner: UNT Libraries Government Documents Department
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Vortices and the Related Principles of Hydrodynamics

Description: Here, conceptions concerning vortices are illustrated by the simplest possible examples. Mathematical formulas and similar means of presentation, which, for the most part, do not help the understanding of persons not versed therein, have been avoided as much as possible. Instead, the author has endeavored to demonstrate the phenomena by means of simple geometrical and mechanical illustrations. For the sake of clarity, the author chiefly considers currents in one plane only, a situation that can be readily represented by diagrams. Some of the peculiarities of vortices in three dimensional flow are briefly discussed.
Date: November 1921
Creator: Betz, A.
Partner: UNT Libraries Government Documents Department
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Experiments With Slotted Wings

Description: Note presenting an investigation of various aspects of slotted wings, including some theoretical and experimental results and characteristics of certain slotted wings currently in production.
Date: November 1921
Creator: Lachmann, G.
Partner: UNT Libraries Government Documents Department
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An Investigation on the Effect of Raked Wing Tips

Description: This investigation was carried out by request of the United States Air Service in the wind tunnel of the Massachusetts Institute of Technology. The results are here published by the National Advisory Committee for Aeronautics as it is thought that they may be of general interest. Wings of the R.A.F. 6 section are tested with various angles of rake, and it is found that although rake has very little effect, a positive or negative rake of 30 degrees is the best.
Date: November 1921
Creator: Norton, F. H.
Partner: UNT Libraries Government Documents Department
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The Choice of Wing Sections for Airplanes

Description: "The subject of the choice of an airfoil section is by no means a closed one, and despite the impossibility of making a single rule serve, it is quite practicable to deduce in a strictly rational manner a series of rules and formulas which are capable of being of the greatest use if we but confine ourselves to the consideration of one element of performance at a time. There are seven such elements of performance which are here taken up in turn. The seven are of different relative importance in different types of airplanes. The seven elements are: maximum speed regardless of minimum; maximum speed for given minimum; maximum speed range ratio; maximum rate of climb; maximum absolute ceiling; maximum distance non-stop; and maximum duration non-stop" (p. 1-2).
Date: November 1921
Creator: Warner, Edward P.
Partner: UNT Libraries Government Documents Department
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The Simplifying Assumptions, Reducing the Strict Application of Classical Hydrodynamics to Practical Aeronautical Computations

Description: Note presenting a general method followed to simplify the numerical work in hydrodynamics, which consists of neglecting quantities of a lower order of magnitude. Four of the solutions covered in this report include the theory of the lateral air forces on airship hulls, theory of wing sections in a two-dimensional flow, theory of wings with a finite span, and propeller theory.
Date: November 1924
Creator: Munk, Max M.
Partner: UNT Libraries Government Documents Department
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An Altitude Chamber for the Study and Calibration of Aeronautical Instruments

Description: "The design and construction of an altitude chamber, in which both pressure and temperature can be varied independently, was carried out by the NACA at the Langley Memorial Aeronautical Laboratory for the purpose of studying the effects of temperature and pressure on aeronautical research instruments. Temperatures from +20c to -50c are obtained by the expansion of CO2from standard containers. The chamber can be used for the calibration of research instruments under altitude conditions simulating those up to 45,000 feet" (p. 1).
Date: November 1925
Creator: Reid, H. J. E. & Kirchner, Otto E.
Partner: UNT Libraries Government Documents Department
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Tests on Riveted Joints in Sheet Duralumin

Description: In making tension tests, the slippage of the joints was noted at three points across each joint. In addition, stress strain curves were obtained for plain tension specimens, and a chemical analysis was made of the sheet.
Date: November 1923
Creator: Rettew, H. F. & Thumin, G.
Partner: UNT Libraries Government Documents Department
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The Distribution of Loads Between the Wings of a Biplane Having Decalage

Description: "It is known that in a biplane the load is not distributed equally between the wings. The presence of one wing will affect the lift characteristics of the other wings. A designer must know the total load that each wing carries in order that he may design an adequate structure. The purpose here is to determine the distribution of loads between the wings of a biplane at various angles of decalage, when the gap/chord ratio is one, and there is no stagger" (p. 1).
Date: November 1927
Creator: Mock, Richard M.
Partner: UNT Libraries Government Documents Department
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Tests of Artificial Flight at High Altitudes

Description: "If we wish to form an accurate idea of the extraordinary progress achieved in aeronautics, a comparison must be made of the latest altitude records and the figures regarded as highest attainable limit some ten years ago. It is desirable, for two reasons, that we should be able to define the limit of the altitudes that can be reached without artificial aid. First, to know to what extent the human body can endure the inhalation of rarified air. Second, the mental capacity of the aviator must be tested at high altitudes and the limit known below which he is able to make reliable observations without being artificially supplied with oxygen" (p. 1).
Date: November 1920
Creator: Gradenwitz, Arthur
Partner: UNT Libraries Government Documents Department
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