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Duck Creek Aqueduct Covered Bridge
Society: Main Category: Civil Sub Category: Bridges Era: 1840-1849 DateCreated: 1839 19001-19041 Pennington Rd. Metamora State: IN Zip: 47030 Country: USA Website: Creator:

Duck Creek Aqueduct is a rare surviving example of a covered timber aqueduct. It was one of several similar structures on the Whitewater Canal, which operated between the Whitewater Valley and the Ohio River from 1839 to 1865. After being displaced by the railroad, the canal supplied hydraulic power for the industrial districts at Metamora and Brookville.

Image Credit: Anthony Dillon Image Caption: Era_date_from:
Universal Soil Loss Equation
Society: ASABE Main Category: Agricultural & Biological Sub Category: Era: 1960-1969 DateCreated: 1965 National Soil Erosion Research Lab West Lafayette State: IN Zip: 47907 Country: USA Website: Creator:

The Universal Soil Loss Equation (USLE) was developed at the USDA National Runoff and Soil Loss Data Center at Purdue University in a national effort led by Walter H. Wischmeier and Dwight D. Smith. The USLE was published in 1965 in USDA Agriculture Handbook 282.

Image Credit: Image Caption: The Universal Soil Loss Equation for estimating average annual soil erosion.

A = average annual soil loss (in tons/acre)
R = rainfall erosivity index
K = soil erodibility factor
LS = topographic factor
C = cropping factor
P = conservation practice factor
The Oliver Chilled Cast-Iron Plow
Society: ASABE Main Category: Agricultural & Biological Sub Category: Mechanization Era: 1850-1859 DateCreated: 1857 Oliver Plow Works South Bend State: IN Zip: 46601 Country: USA Website: Creator: Oliver, James

On June 30, 1857, James Oliver filed a patent application for chilling the wear face of cast-iron moldboard plows.  While pouring molten cast iron in sand molds he circulated hot water through chillers to regulate the rate of cooling. Oliver's control of raw material content and cooling produced moldboards with a very hard surface  and a softer, tough inner core for strength.  Their fine textured wearing faces of uniform hardness maintained a mirror polish and resisted rust.

Image Credit: Image Caption: Era_date_from:
Rumely OilPull Tractor
Society: ASABE Main Category: Agricultural & Biological Sub Category: Era: 1910-1919 DateCreated: 1910 La Porte Hospital La Porte State: IN Zip: 46350 Country: USA Website: Creator:

The Rumely Companies, which operated in La Porte, Indiana, from 1853 to 1931, produced a variety of equipment including threshers and steam engines, which helped to change the nature of American and world agriculture. The revolutionary OilPull Tractor, which was introduced in 1910, used a unique carburetion system developed by John Secor, the Company's Chief Engineer. The OilPull tractor efficiently converted a low cost petroleum product to mechanical power, greatly reducing the need for animal and steam power on American farms. Dr.

Image Credit: Courtesy Wikipedia/BulldozerD11 (CC BY-SA 3.0) Image Caption: Era_date_from:
Part of the Purdue Cirrus training fleet on the ramp
Society: AIAA Main Category: Aerospace & Aviation Sub Category: Education Era: 1930s DateCreated: 1930 Purdue University Airport West Lafayetta State: IN Zip: Country: USA Website:,, Creator:

The Purdue University Airport was the first collegiate owned airport in the United States. It hosted Amelia Earhart for her final adventure, was the training ground for test pilots such a Jimmy Johnson and Ivan Kincheloe, balloonist Malcolm Ross, and astronaut Neil Armstrong. Purdue University Airport and its people and programs pushed aviation’s evolution to new heights and helped expand the frontiers of flight. During WWII, hundreds of U.S. Army and Navy members were trained at the airport.

Image Credit: Courtesy Wikicommons/SkyHigh757 (CC BY-SA 4.0) Image Caption: Part of the Purdue Cirrus training fleet on the ramp Era_date_from:
West Baden Springs Hotel
Society: ASCE Main Category: Civil Sub Category: Buildings Era: 1900-1909 DateCreated: 1901 West Baden Springs Orange County State: IN Zip: 47469 Country: USA Website: Creator: Albright, Harrison , Westcott, Oliver

The steel dome stretches 200 feet in diameter and rises 100 feet at its top. To accommodate thermal expansion, the inverted bowl-shaped structure originally rested on rollers that sat on the flat tops of six-story columns

There was a time when Americans from the Eastern seaboard braved long rail trips to southern Indiana in hopes that the water at the French Lick natural mineral springs could bring relief from alcoholism, pimples, gallstones and a host of other ailments and illnesses.

Image Credit: Courtesy Flickr/Bulldog23 (CC BY-ND 2.0) Image Caption: West Baden Springs Hotel Era_date_from: 1901
Rumely Companies' Agricultural Products
Society: ASME Main Category: Mechanical Sub Category: Agriculture Era: 1850-1859 DateCreated: 1853 1007 Lincolnway La Porte State: IN Zip: Country: USA Website:, Creator: Rumely, Meinrad

Beginning with the blacksmith shop of German immigrant Meinrad Rumely (1823-1904), this successive family of firms invented and produced a line of agricultural equipment that played a vital role in the evolution of farming based on the muscle of humans and animals to one based on the power of the steam and ultimately the internal-combustion engine. The M. & J. Rumely Co. became the M. Rumely Co., and then the Advance Rumely Co. The Allis-Chalmers Company acquired the business in 1931.

Image Credit: Courtesy Wikipedia/BulldozerD11 (CC BY-SA 3.0) Image Caption: Rumely Companies' Agricultural Products Era_date_from: 1853
Duck Creek Aqueduct
Society: ASCE Main Category: Civil Sub Category: Bridges Era: 1840-1849 DateCreated: 1846 Whitewater Canal Metamora State: IN Zip: 47030 Country: USA Website: Creator: Hutchens, Charles

The significance of the 15-mile Whitewater Canal was not in its ability to create a profit, but rather its effect on the economic growth of the Whitewater River Valley, considered the gateway to the interior of Indiana. Before the canal, travel was challenging. Most waterways in Indiana were only navigable by canoe, and the alternative - horse and wagon - was difficult, slow and expensive.  

Image Credit: Public Domain (Author's Choice) Image Caption: Duck Creek Aqueduct Era_date_from: 1846
Development of Diagnostic Test Strips
Society: ACS Main Category: Chemical Sub Category: Medical Era: 1940s DateCreated: 1941 ETHOS Science Center Elkhart State: IN Zip: Country: USA Website:, Creator: Free, Al, Free, Helen

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 and liver conditions. Today, self-management of these diseases is an easier process because of the development of diagnostic test strips by Alfred and Helen Free and their research team at Miles Laboratories.


The text of the plaque commemorating the development reads:

Image Credit: Image Caption: Advert for Ames home urine testing kit Era_date_from:
Curtis 500-kW Vertical Turbine
Society: ASME Main Category: Electric, Mechanical Sub Category: Steam Era: 1900-1909 DateCreated: 1903 Indianapolis State: IN Zip: Country: USA Website:, Creator: Curtis, Charles G.

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 & Light Co. for display and later moved to the company's E.W. Stout Station.

Image Credit: Image Caption: 5,000-kilowatt Curtis Steam Turbine-Generator Era_date_from: 1903
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