Trials of the new product were launched in the 1950s at Indiana University (IU), in Bloomington. There, a dentist instructed children to brush their teeth — in whichever way they normally did — with a new kind of paste. After six months, the kids came back for a checkup. These local children were not just dental patients, they were participants in one of the biggest clinical trials ever run on toothpaste. The main investigator in this endeavor was Dr. Joseph Muhler, a dentist and assistant professor in the university’s chemistry department.
1955
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Image Credit: Procter & GambleImage Caption: A technician checks Crest’s tooth cleaning ability using a microscope and ultraviolet light.
2024
This propulsion wind tunnel (PWT) at Arnold AFB was the first large-scale facility for testing jet and rocket engines in simulated high-speed flight conditions. It has a unique combination of transonic (1955) and supersonic (1960) wind tunnels using a common 236,000 horsepower drive, the world's largest when built. It can achieve air speeds up to Mach 4.75 at altitudes up to 150,000 feet in its 16-foot square, removable test sections. Design engineers were Lief J. Sverdrup, John R. Parcel, Brice Smith, and Walter Cook, of Sverdrup and Parcel, St.
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Image Credit: Public Domain (US Air Force)Image Caption: The world's first large-scale testing facility for jet and rocket engines in simulated high-speed flight conditionsEra_date_from: 1955
1989
This is one of the three original 60-ton vessels by which the basic oxygen process (BOP) of steel making was introduced into this country from Austria, where it was invented. It heralded the first new technology in fifty years to become the basis of a major process for steel production throughout the world. In this process, a water-cooled lance injected a jet of high-purity oxygen into the bath of molten iron. Various chemical reactions produced a quality low-nitrogen steel at a ton-per-hour rate nearly three times that of the open hearth furnace.
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Image Credit: Courtesy ASMEImage Caption: Basic-Oxygen Steel Making VesselEra_date_from: 1955
1985
This inertia dynamometer is used to test railroad wheels under controlled conditions that can greatly exceed normal service. It is the first and only railroad dynamometer to test track wheels using vertical and lateral loads, as well as thermal braking loads, at the wheel rim. It can also test railway car and locomotive axles.
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Image Caption: AAR Railroad-wheel DynamometerEra_date_from: 1955
1988
Innovations
This inertia dynamometer is used to test railroad wheels under controlled conditions that can greatly exceed normal service. It is the first and only…
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This is one of the three original 60-ton vessels by which the basic oxygen process (BOP) of steel making was introduced into this country from Austria, where it was invented. It heralded the first new technology in fifty years to become the basis of a major process for steel production throughout… Read More
This propulsion wind tunnel (PWT) at Arnold AFB was the first large-scale facility for testing jet and rocket engines in simulated high-speed flight conditions. It has a unique combination of transonic (1955) and supersonic (1960) wind tunnels using a common 236,000 horsepower drive, the world's… Read More
Trials of the new product were launched in the 1950s at Indiana University (IU), in Bloomington. There, a dentist instructed children to brush their teeth — in whichever way they normally did — with a new kind of paste. After six months, the kids came back for a checkup. These local children…
Read More