Ackley Bridge is an excellent example of a multiple kingpost truss and a noteworthy early example of covered bridge preservation efforts in the United States. Built in 1832 by Joshua Ackley (b.1805) and Daniel Clouse (b.1812), Ackley Bridge originally spanned Enslow’s Branch of Wheeling Creek between Greene County and Washington County in Pennsylvania, where it carried traffic for over a century.
A Historic Landmark of Agricultural Engineering in 1834 Near the Village of Climax, Michigan, Hiram Moore and John Hascall Built and Put Into Practical Use the First Successful Grain Combined Harvester - Thresher Which was Patented June 28, 1836. This Achievement was a Significant Contribution to the Development of American Agriculture Dedicated by the American Society of Agricultural Engineers 1978
On this site in 1837 John Deere built the first successful self-scouring steel plow, thereby making a significant contribution to the development of American agriculture. Dedicated by American Society of Agricultural Engineers 1976
Farm And Residence of John Johnston 1791 - 1880 Eminent Farmer Who Here Originated Tile Underdrainage in America in 1835 and Thereby Became an Outstanding Contributor to Human Welfare Honored by The American Society of Agricultural Engineers 1935. Erected by State Education Department
The Rainhill Trials were an important competition in the early d
New Innovation gateway
"Some of New Hampshire's most aesthetically pleasing yet least appreciated structures are stone arch bridges."
Chartered in 1825, the Louisville and Portland Canal Company was authorized to construct a canal around the rapids called the "Falls of the Ohio." Construction started on March 1, 1826. The canal and first generation of locks were completed in 1830. As originally constructed, the canal was 1.9 miles long, 64 feet wide, and terminated at its lower end with a three-flight lock system with a total lift of 26 feet. Each lock chamber was 198 feet long between miter posts, with available length for vessels of 183 feet, width of 52 feet, and a lift at low stages of 8.5 feet.