The Northern Pacific High Line Bridge No. 64, built between 1907 and 1908, has continued to perform yeoman service in the uninterrupted flow of the Nation's commerce. Nearly, 100 years after this bridge officially opened, it still carries 125-ton car unit coal trains, double stack container trains, lumber, and refined products at train speeds of 50 m.p.h.
2004
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Image Credit: Original Photo: Public Domain; Produced prior to 1/1/1923Image Caption: Northern Pacific High Line Bridge No 64Era_date_from: 1908
2004
Built between 1794 and 1796 by the 22nd King of the Joseon Dynasty, Jeongio, this fortress is an outstanding example of early modern defensive works. Principally designed by Jeong Yak-Yong, it incorporated the most highly developed features of science and engineering from both the east and west.
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Image Credit: Courtesy Flickr/d. FUKA (CC BY-SA 2.0)Image Caption: Hwaseong FortressEra_date_from: 1796
2004
The Decew Falls Hydro-Electric Development was a pioneering project in the generation and transmission of electrical energy at higher voltages and at greater distances in Canada. On 25 August 1898 this station transmitted power at 22,500 Volts, 66 2/3 Hz, two-phase, a distance of 56 km to Hamilton, Ontario. Using the higher voltage permitted efficient transmission over that distance. The Cataract Power Company of Hamilton Limited (the predecessor to the Dominion Power and Transmission Company) was organized in 1896.
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Image Credit: Courtesy Flickr/ontariopowergeneration (CC BY 2.0)Image Caption: Decew Falls Hydro-Electric PlantEra_date_from: 1898
2004
Kinematics is the study of geometry of motion. Reuleaux designed the models in the Cornell collection as teaching aids for invention, showing the kinematic design of machines. The mechanisms in the collection represent the fundamental components of complex machines and were conceived as elements of a basic “language of invention.” Today the models are still used in the teaching of machine design and synthesis, robotics, dynamics, architectural drawing and mathematics.
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Image Credit: Courtesy ASMEImage Caption: A page taken from Gustav Voigt's catalog of Reuleaux's Mechanisms,Era_date_from: 1882
2004
The growth of the shrimp processing industry and its impact on local economies along the northern Gulf of Mexico, The U.S. West Coast and in more than forty other countries is largely attributable to the “machine that peels shrimp,” invented by sixteen year old James Martial Lapeyre from Houma, Louisiana,.
The current Laitram Machinery Model A Automatic Shrimp Peeler is virtually identical to the first unit that was put into commercial use in 1949. Each machine peels approximately 1,000 pounds of shrimp an hour, ranging in size from 10 to 200 count per pound.
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Image Credit: Courtesy ASMEImage Caption: Lapeyre Automatic Shrimp Peeling MachineEra_date_from: 1949
2004
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 ancient reservoirs represent extraordinary engineering achievements by the Ancestral Puebloan people. In an arid environment with very little surface water, these prehistoric people found ways to route and capture runoff to create sustainable domestic water supply reservoirs.
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Image Credit: Courtesy Wikipedia/McGhiever (CC BY-SA 3.0)Image Caption: Prehistoric Mesa Verde ReservoirsEra_date_from: 750
2004
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 integrated electronic technology and all-in-one design, were the basis for subsequent modern instrumentation developed by Beckman and his company.
The plaque commemorating the development reads:
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Image Credit: Courtesy Science History InstituteImage Caption: Chemist George Garcelon using a portable Beckman pH meter in laboratory, 1951. Interior of Research Laboratory, Althouse Chemical Plant, 500 Pear Street, Reading, PennsylvaniaEra_date_from: 1936
2004
Innovations
