Sloss Blast Furnaces has been designated a National Historic Landmark. This site possesses national significance in commemorating the history of the United States of America.
1981.
ASM International has designated Sloss Furnaces an historical landmark.
Sloss Furnaces, which became operative in 1882, were instrumental in establishing the iron industry in the South. Modernized in 1927-1928, they remained in operation until 1970.
1986.
USA
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Image Credit: Birmingham, Al GovernmentImage Caption: Sloss Blast Furnace site in Birmingham
1981
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.
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Image Credit: Procter & GambleImage Caption: A technician checks Crest’s tooth cleaning ability using a microscope and ultraviolet light.
2024
CincinnatiState: OHZip: 45267Country: USAWebsite: https://www.acs.org/education/whatischemistry/landmarks/benadryl.htmlCreator: Rieveschl, George
The antihistamine Benadryl has provided temporary relief from allergy symptoms for millions of people since it was developed by George Rieveschl at a University of Cincinnati laboratory in the early 1940s and later approved by the U.S. Food and Drug Administration (FDA). Rieveschl was originally studying muscle relaxants when he discovered the compound diphenhydramine hydrochloride. He sold it under the name ‘Benadryl,’ among others.
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Image Credit: George Rieveschl, Jr. Papers of The Lloyd Library & MuseumImage Caption: Rieveschl holding a Benadryl capsule, the medication that has provided allergy relief to millions worldwide.
2025
In the 1940s, researchers Irvine Page, Maurice Rapport, Arda Green and Betty Twarog made pioneering discoveries that transformed modern neuroscience. While investigating hypertension at Cleveland Clinic, Page, Rapport and Green helped identify and isolate serotonin (5-hydroxy-tryptamine). Twarog later demonstrated its presence in the mammalian brain, establishing serotonin as a neurotransmitter. Together, their breakthroughs opened the door to understanding serotonin’s essential roles in regulating mood, appetite, digestion, healing and numerous physiological processes.
The crawler-transporters, formally known as the Missile Crawler Transporter Facilities, are a pair of tracked vehicles used to transport spacecraft from NASA's Vehicle Assembly Building (VAB) along the Crawlerway to Launch Complex 39. They were originally used to transport the Saturn IB and Saturn V rockets during the Apollo, Skylab and Apollo-Soyuz programs. They were then used to transport Space Shuttles from 1981 to 2011. The crawler-transporters carry vehicles on the mobile platform launchers used by NASA, and after each launch return to the pad to take the platform back to the VAB.
YearAdded:
1982
The Broadmoor Manitou and Pikes Peak Cog Railway (also known as the Pikes Peak Cog Railway) is a cog railway that climbs one of the most iconic mountains in the United States, Pikes Peak in Colorado. The base station is in Manitou Springs, near Colorado Springs.
The Magma Copper Mine AC system designed by the Carrier Corporation was the first underground mechanical air conditioning system in North America. The initial installation of refrigerated cooling equipment in the Magma Mine at Superior, Arizona was necessary due to the increase in temperature lower into the mine. Below the 2000-foot level, the increase in rock temperature is approximately 1½ degrees F. per 100 feet of depth. The rock temperature on the 2000-foot level is 109°.
The Old Lock Pump House, whose first element was built in 1837, preserves a feature of the old canal, which relied on locks and pumps to move vessels over the low divide of the Delmarva Peninsula between Chesapeake Bay and Delaware Bay. Because there are no large rivers on the peninsula, water had to be pumped uphill to fill the upper canal and locks.
The Belle Isle gas turbine was installed in 1949 and was the first gas turbine built in the United States for the purpose of generating electric power. Its low cost and consistency aroused considerable interest in the electric utility industry, both here and abroad.
The Portsmouth Navy Yard is a United States Navy shipyard in Kittery on the southern boundary of Maine near the city of Portsmouth, New Hampshire. Founded in 1800, PNS is U.S. Navy's oldest continuously operating shipyard. Today, most of its work concerns the overhaul, repair, and modernization of submarines. he Portsmouth Naval Shipyard was established on June 12, 1800, during the administration of President John Adams.
Innovations
The ABACUS II, designed and built by Texas Instruments, was the first practical automated production machine for the assembly of integrated circuits. Using heat and pressure, it bonded fine gold wire to microscopic contacts on the silicon chip and pin connections on the package.
The…
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This, the first Curtis vertical turbine built, was constructed by the General Electric Co. for the Newport & Fall River Street Railway Co. It operated in the Newport, R.I., generating station until June 1927. It was transferred to the Harding Street Station of the Indianapolis Power &…
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In his laboratory at Western Reserve University (Now Case Western Reserve University), Edward W. Morley carried out his research on the atomic weight of oxygen that provided a new standard to the science of chemistry. The accuracy of his analyses has never been superseded by chemical means. His…
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Working in Bailey Hall on December 7, 1905, Hamilton P. Cady and David F. McFarland discovered significant amounts of helium in a natural gas sample from Dexter, Kansas. Cady and McFarland subsequently analyzed more than 40 other gas samples, showing that helium, previously thought to be rare on…
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In his search for a more economical way to make aluminum, Canadian inventor Thomas Leopold Willson accidentally discovered the first commercially viable process for making calcium carbide, which is used for production of acetylene gas, at a location in North Carolina. This chance discovery…
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On January 4, 1891, Herbert H. Dow succeeded in producing bromine electrolytically from central Michigan’s rich brine resources. In the years that followed, this and other processes developed by Dow and the company he founded led to an increasing stream of chemicals from brines. The commercial…
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In 1899, during the earliest days of the automobile revolution, A. O. Smith developed a new, lightweight steel car frame. Within a few short years, he was selling these frames to a “who’s who” of car makers including Cadillac, Oldsmobile, and Ford. A. O. Smith’s son, Lloyd Raymond, carried on…
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Steroid chemists often refer to the 1930s as the Decade of the Sex Hormones, when the molecular structures of certain sex hormones were determined and first introduced to medical practice as drugs. Russell Marker achieved the first practical synthesis of the pregnancy hormone, progesterone, by…
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In brilliant collaboration, Carl and Gerty Cori studied how the body metabolizes glucose and advanced the understanding of how the body produces and stores energy. Their findings were particularly useful in the development of treatments for diabetes. In 1947 the Coris shared a Nobel Prize for…
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It is difficult to recall a time when doctors and patients had trouble tracking the presence of glucose and other substances in urine and blood. Lack of sufficient measurement tools made it difficult to manage a host of diseases, including diabetes as well as other metabolic diseases and kidney…
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Monroe Wall, Mansukh Wani and colleagues at the Natural Products Laboratory of the Research Triangle Institute discovered and elucidated the structure Taxol®and camptothecin, two life-saving compounds for the treatment of cancer. These natural products kill cancer cells via unique mechanisms of…
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Founded in 1957, Raychem Corporation was the first company to successfully apply the new science of radiation chemistry to commercial use. This accomplishment led to the creation of tough new materials and high-performance products such as irradiated polyethylene insulated wire and heat-…
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Bread is considered a basic foodstuff; eaten down through the ages, it continues to be a staple of the modern diet. The development of baking powder made baking easier, quicker and more reliable for bakers in the mid-19th century. Eben Horsford’s unique formula was an important innovation and…
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When Arnold Beckman, a professor of analytical chemistry at the California Institute of Technology, was asked to devise a way to measure acidity in citrus fruit, the resulting “acidometer” revolutionized chemical instrumentation. The innovative features of the pH meter, including its use of…
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Around 1907, Belgian-born chemist Leo Hendrik Baekeland took two ordinary chemicals, phenol and formaldehyde, mixed them in a sealed autoclave, and subjected them to heat and pressure.
The sticky, amber-colored resin he produced in his Yonkers laboratory was the first plastic ever to be…
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This was a pioneering venture in mainline railroad electrification and was a proving ground for railroad electrification technology. It established single-phase alternating current as a technical and economical alternative to direct current. This concept exerted considerable influence over…
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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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During the 1930's, research into advanced ballistic measurement techniques began at Aberdeen Proving Ground—the world's first large-scale, fully-instrumented ballistic range producing data on the aerodynamic characteristics of missiles in free flight.
Although this research had begun…
Read MoreCreated by Don A. Sillers, founder of Peerless Manufacturing, and Alexander Clarke, this early Type M gas odorizer—Serial No. 2105—served from 1942 to 1992. It injected a precise amount of pungent liquid into the gas flow. The patent was filed June 18, 1939, and granted (2,240,808) on May 6,…
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Four prehistoric reservoirs at Mesa Verde National Park were constructed and used between AD 750 and AD 1180. They are: Morefield Reservoir (in Morefield Canyon), Far View Reservoir (on Chapin Mesa), Sagebrush Reservoir (on an unnamed mesa), and Box Elder Reservoir (in Prater Canyon). These four…
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