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Planting and care of street trees.
Describes the importance of shade trees within city limits, including: how to plan the layout of street trees; the various types of trees best suited for city growth; and how to properly maintain city-grown trees.
Date:
August 1921
Creator:
Mulford, Furman Lloyd, b. 1869
Object Type:
Book
System:
The UNT Digital Library
Milk and its uses in the home.
A consumer guide to buying, storing, and using milk.
Date:
August 1921
Creator:
United States. Department of Agriculture. States Relations Service.
Object Type:
Book
System:
The UNT Digital Library
High Efficiency of Seaplanes
A table is presented which includes data for calculating the index of efficiency. The author uses this data to conclude that seaplanes cannot be considered inferior to terrestrial airplanes.
Date:
August 1921
Creator:
Pegna, G.
Object Type:
Report
System:
The UNT Digital Library
Problem of Landing
The author discusses various aspects of landing aircraft such as the actual process of touchdown and the problems associated with the tail skid touching the ground before the landing gear.
Date:
August 1921
Creator:
Pistolesi, E.
Object Type:
Report
System:
The UNT Digital Library
Calculation of Wing Spars
A simplified formula for calculating wing spars is presented.
Date:
August 1921
Creator:
Ratzersdorfer, Julius
Object Type:
Report
System:
The UNT Digital Library
Calculation of Wing Spars
The author presents a comparison and combination of the numerical and geometrical determinations of the maximum M, when calculating the maximum bay moment.
Date:
August 1921
Creator:
Müller-Breslau, H.
Object Type:
Report
System:
The UNT Digital Library
Large German airship stations
"It is profitable to examine the organization and equipment of the German airship stations. The stations best adapted for serving as the basis of this study were chiefly constructed by the German Navy, during the war, for exclusively military purposes and do not therefore entirely satisfy the conditions of exploitation required for a civilian air service. The requisite modifications for satisfying the latter conditions may nevertheless be readily determined according to circumstances" (p. 1).
Date:
August 1921
Creator:
Sabatier, J.
Object Type:
Report
System:
The UNT Digital Library
Shape and Strength of Seaplane Under-Structures With Special Regard to Seaworthiness
This report presents experiments and calculations for the purpose of determining the landing gear requirements upon the water. Moving pictures are given which furnish data and also may give both the magnitude and direction of the forces acting. Different classes of seaplanes are examined and proposals for calculation instructions are given.
Date:
August 1921
Creator:
Lewe, Victor
Object Type:
Report
System:
The UNT Digital Library
The Employment of Airships for the Transport of Passengers: Indications on the Maximum Limits of Their Useful Load, Distance Covered, Altitude and Speed
It was a conclusion of this detailed study of the practicality of using airships for carrying passengers that, although slow, airships are capable of carrying useful loads over long distances. However, it is noted that there is a certain limit to the advantages of large cubature. Beyond a certain point, the maximum altitude of the airship goes on decreasing, in spite of the fact that the range of action in the horizontal plane and the useful load go on increasing. The possibility of rapid climb is an essential factor of security in aerial navigation in the case of storms, as is velocity.
Date:
August 1921
Creator:
Nobile, Umberto
Object Type:
Report
System:
The UNT Digital Library
A New Method of Testing in Wind Tunnels
Now, in existing wind tunnels, using a horsepower of 100 to 300, the models are generally made to a 1/10 scale and the speed is appreciably lower than the speeds currently attained by airplanes. The Reynolds number realized is thus 15 to 25 times smaller than that reached by airplanes in free flight, while the ratio of speed to the velocity of sound is between a third and three quarters of the true ratio. The necessary increases in either the diameter of the wind tunnel or the velocity of the airstream are too costly.
Date:
August 1921
Creator:
Margoulis, W.
Object Type:
Report
System:
The UNT Digital Library
Calculation of Wing Spars
The author presents a comparison and combination of the numerical and geometrical determinations of the maximum M, when calculating the maximum bay moment.
Date:
August 1921
Creator:
Müller-Breslau, H.
Object Type:
Report
System:
The UNT Digital Library
Gas Masks for Gases Met in Fighting Fires
Technical paper issued by the Bureau of Mines over the development of gas masks designed for fighting fires. The characteristics of the different types of masks in development are presented. This paper includes tables, illustrations, and photographs.
Date:
August 1921
Creator:
Fieldner, Arno Carl; Katz, Sidney H. & Kinney, Selwyne P.
Object Type:
Report
System:
The UNT Digital Library
Farm-Gate
Patent for an improved hinge mounting for a gate to swing and to served as a stay or brace connecting a pair of posts supporting the gate. Also, a provision of a novel mounting and operating means for such a gate, including springs for raising the operating levers on the gate used to move the gate.
Date:
August 23, 1921
Creator:
Rawley, Fleming C.
Object Type:
Patent
System:
The Portal to Texas History
Metal-Working Device.
Patent for a hand-operated device that bends and shears metal at any desired angle and length.
Date:
August 16, 1921
Creator:
Bussel, H.
Object Type:
Patent
System:
The Portal to Texas History
Oil-Burner.
Patent for oil burner that simultaneously ignites and vaporizes liquid fuel.
Date:
August 16, 1921
Creator:
Mills, V.H.
Object Type:
Patent
System:
The Portal to Texas History
Plaiting-Machine.
Patent for a machine that folds or plaits cloth in the desired style.
Date:
August 16, 1921
Creator:
Odle, Ophelia.
Object Type:
Patent
System:
The Portal to Texas History
Door Attachment.
Patent for a weather strip attachment for doors which would automatically extend from the bottom of the door to the floor when the door is in the closed position and retract to the bottom edge of the door when the door is opened.
Date:
August 2, 1921
Creator:
Swenson, Frank O.
Object Type:
Patent
System:
The Portal to Texas History
Fountain-Pen Blotting Attachment.
Patent for an attachment for fountain pens that would hold a roll of blotting paper or other ink absorbing material on a revolving stem to be used to remove extra ink from paper after using the fountain pen. The attachment is contained in a cap that is attached to the end of the fountain pen.
Date:
August 9, 1921
Creator:
Odom, Blaine W.
Object Type:
Patent
System:
The Portal to Texas History
Rock-Drill
Patent for a rock drill design for quick drilling.
Date:
August 16, 1921
Creator:
Alford, Allen
Object Type:
Patent
System:
The Portal to Texas History
Cultivating-Hoe.
Patent for cultivating hoe in which operating segment is adapted to be multifaceted and prevent becoming dull.
Date:
August 9, 1921
Creator:
Church, R.D.
Object Type:
Patent
System:
The Portal to Texas History
Door-Hook.
Patent for a low-cost door hook designed for securing screen doors in a closed position which may be operated from either side of the door.
Date:
August 30, 1921
Creator:
Randazzo, Lillian
Object Type:
Patent
System:
The Portal to Texas History
Apparatus for Separating Substances of Different Dielectric Capacities.
Patent for an apparatus for separating substances of different dielectric capacities; the objective of this invention is to provide means for the material to be separated into its component particles for the purpose of producing material of dielectric hysteric impedance and collecting the separated particles according to the difference in time that the particles maintain their polarity due to the impedance generated from them.
Date:
August 2, 1921
Creator:
Sutton, Henry M.
Object Type:
Patent
System:
The Portal to Texas History
Street-Directory.
Patent for business guide and street directory to help identify locations of business houses, streets, and street numbers more quickly and effectively.
Date:
August 2, 1921
Creator:
Marshall, F.N.
Object Type:
Patent
System:
The Portal to Texas History
Bandage
Patent for a bandage made of elastic material which includes a flap that can be fastened, or unfastened, and which acts as a holder for an absorbent material that can be replaced.
Date:
August 9, 1921
Creator:
Kirwan, Leah M.
Object Type:
Patent
System:
The Portal to Texas History