1929

Designated an Historic Landmark of Agricultural Engineering. In the Shelbyville Area During the Spring of 1929, Raymore McDonald Designed and Developed the First Commercial Pick-Up Baler as Conceived and Financed by Horace Tallman and His Sons, Leslie R. and Gentry L. These Balers were Marketed for Many Years by the Ann Arbor Machine Company of Shelbyville. This Concept of Field Processing of Farm Forages Made a Significant Contribution to the Efficiency and Economy of Mechanized Forage Harvesting in the World's Agriculture.

H. John Eastman introduces controlled directional drilling in 1929 and was awarded a patent the following year.

The technique became widely adopted after an oil strike in Conroe, Texas, caught fire in January 1933. The well exploded, creating a 600-foot deep crater, and the oil burned for months. Although the fire was eventually put out,  oil continued to flow into the “lake.” The only way to manage this was to drill another well to relieve the pressure.

The tower was designed to rest on a continuous reinforced concrete mat, 4 feet thick, with the base of the slab 24 feet below street level.

What makes the Texas Commerce Bank Building revolutionary in the civil engineering world is not so much the building itself, but its foundation.  Initial studies for the type of foundation to be used began in the fall of 1927.  William E. Simpson, the building's chief structural engineer, suggested using a mat foundation, something new for Houston's multistory buildings.

Navajo Bridge spans Marble Canyon, 470 feet above the Colorado River in Grand Canyon National Park. It was considered the highest steel arch bridge in America when completed.

The Navajo Bridge (also known as the Grand Canyon Bridge) was built in 1929 by the Arizona Highway Department and provided a vital transportation link over the Grand Canyon between northern Arizona and southern Utah. Construction commenced by building on one side of the canyon, then on the other, until the two sides met in the middle.

Wind dynamics were a major consideration in building such a huge structure. When winds blow against the building, they are deflected up over the roof, creating a partial vacuum that can draw the roof up with a force several times greater than the direct force of the wind. Wind tunnel testing on a model helped designers decide that a semi-parabolic shape would best resolve air current concerns.

Established in 1929, and owned by several different aviation companies through its history, the Downey site was the design, test, and production site for various airplanes and spacecraft that defined American aerospace accomplishments in the 20th century.

The Connecticut Light & Power Company pioneered the use of pumped storage in the United States at this hydroelectric station. First operated in 1929, the Rocky River Plant had two reversible pumps that somewhat resemble large hydroelectric turbines. This permitted significant improvements in the system efficiency of the company's network of hydroelectric and thermal-electric power generating plants. Water is pumped uphill through a penstock and stored in Lake Candlewood.

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 their discoveries.

The plaque commemorating the event reads: