Description: This is a photograph of a portable rubber belt conveyor made by the Jeffrey Manufacturing Company of Columbus, Ohio, owned by the Modern Foundry Company, of Cincinnati, Ohio. The Jeffrey Manufacturing Company, also known as the Jeffrey Mining Corporate Center, was established in 1876 as the Lechner Mining Machine Company in Columbus, Ohio by Joseph Jeffrey and Francis Lechner. The company was the number one manufacturer of coal mining machinery worldwide until the mid-twentieth century. View on Ohio Memory.
Image ID: AL01359
Subjects: Conveying machinery; Coal mines and mining -- Ohio; Inventions; Coal-mining machinery; Manufacturing industries--Ohio; Inventors -- Ohio; Ohio Economy--Economy--Labor
Places: Cincinnati (Ohio); Hamilton County (Ohio)
 

Description: This photograph depicts mechanical vibrating conveyors, or MV conveyors, made by the Jeffrey Manufacturing Company in Columbus, Ohio, being used at a metal casting foundry in Cleveland, Ohio, in 1955. The Jeffrey Manufacturing Company, also known as the Jeffrey Mining Corporate Center, was established in 1876 as the Lechner Mining Machine Company in Columbus, Ohio by Joseph Jeffrey and Francis Lechner. The company was the number one manufacturer of coal mining machinery worldwide until the mid-twentieth century. View on Ohio Memory.
Image ID: AL00955
Subjects: African Americans--Employment; Coal mining; Coal mines and mining--Ohio; Coal mines and mining--United States; Inventions; Coal-mining machinery; Manufacturing industries--Ohio; Inventors--Ohio; Ohio Economy--Economy--Labor;
Places: Cleveland (Ohio); Cuyahoga County (Ohio); Columbus (Ohio)
 

Description: This photograph depicts pit car loaders under construction at the Jeffrey Manufacturing Company in Columbus, Ohio. Loaders eliminated the time-consuming job of loading coal into pit cars by hand, which increased production and lowered cost. These 38D loaders were later shipped to the Peabody Coal Company. The Jeffrey Manufacturing Company, also known as the Jeffrey Mining Corporate Center, was established in 1876 as the Lechner Mining Machine Company in Columbus, Ohio, by Joseph Jeffrey and Francis Lechner. The company was the number one manufacturer of coal mining machinery worldwide until the mid-twentieth century. View on Ohio Memory.
Image ID: AL01521
Subjects: Coal mines and mining -- Ohio; Inventions; Coal-mining machinery; Manufacturing industries--Ohio; Inventors -- Ohio; Ohio Economy--Economy--Labor
Places: Columbus (Ohio); Franklin County (Ohio)
 

Description: This photograph depicts a portable loader owned by the Hamilton Moulding Sand Company, Hamilton, Ohio, and made by the Jeffrey Manufacturing Company of Columbus, Ohio. It is loading molding sand into a horse-drawn wagon driven by a Hamilton employee. Molding sand was used in foundries to produce castings from molten metal. The Jeffrey Manufacturing Company, also known as the Jeffrey Mining Corporate Center, was established in 1876 as the Lechner Mining Machine Company in Columbus, Ohio by Joseph Jeffrey and Francis Lechner. The company was the number one manufacturer of coal mining machinery worldwide until the mid-twentieth century. View on Ohio Memory.
Image ID: AL01358
Subjects: Horse-drawn vehicles; Coal mines and mining -- Ohio; Inventions; Coal-mining machinery; Manufacturing industries--Ohio; Inventors -- Ohio; Ohio Economy--Economy--Labor
Places: Hamilton (Ohio); Butler County (Ohio)
 

Description: The dining tent and its diners that was set up during a camping trip taken by rubber manufacturer Harvey Firestone, inventor Thomas Edison and automobile manufacturer Henry Ford in 1921. This trip was one of many that Ford, Firestone, and Edison took together between 1916 and 1924. Harding was invited to their camping trip in Maryland in July of 1921, which became known as "Camp Harding." The circular dining table was nine feet in diameter and had a Lazy Susan on the top so that diners could reach any of the dishes they wanted. It also folded so that it could be transported easily. View on Ohio Memory.
Image ID: AL03564
Subjects: Presidents--United States; Ohio History--Presidents and Politics; Industrialists--Ohio; Inventors
Places: Pecktonville (Maryland); Pecktonville (Maryland)
 

Description: The dining tent and its diners that was set up during a camping trip taken by rubber manufacturer Harvey Firestone, inventor Thomas Edison and automobile manufacturer Henry Ford in 1921. This trip was one of many that Ford, Firestone, and Edison took together between 1916 and 1924. Harding was invited to their camping trip in Maryland in July of 1921, which became known as "Camp Harding." The circular dining table was nine feet in diameter and had a Lazy Susan on the top so that diners could reach any of the dishes they wanted. It also folded so that it could be transported easily. View on Ohio Memory.
Image ID: AL03565
Subjects: Presidents--United States; Ohio History--Presidents and Politics; Industrialists--Ohio; Inventors
Places: Pecktonville (Maryland); Pecktonville (Maryland)
 

Description: The dining tent and its diners that was set up during a camping trip taken by rubber manufacturer Harvey Firestone, inventor Thomas Edison and automobile manufacturer Henry Ford in 1921. This trip was one of many that Ford, Firestone, and Edison took together between 1916 and 1924. Harding was invited to their camping trip in Maryland in July of 1921, which became known as "Camp Harding." The circular dining table was nine feet in diameter and had a Lazy Susan on the top so that diners could reach any of the dishes they wanted. It also folded so that it could be transported easily. View on Ohio Memory.
Image ID: AL03564
Subjects: Presidents--United States; Ohio History--Presidents and Politics; Industrialists--Ohio; Inventors
Places: Pecktonville (Maryland); Pecktonville (Maryland)
 

Description: The dining tent and its diners that was set up during a camping trip taken by rubber manufacturer Harvey Firestone, inventor Thomas Edison and automobile manufacturer Henry Ford in 1921. This trip was one of many that Ford, Firestone, and Edison took together between 1916 and 1924. Harding was invited to their camping trip in Maryland in July of 1921, which became known as "Camp Harding." The circular dining table was nine feet in diameter and had a Lazy Susan on the top so that diners could reach any of the dishes they wanted. It also folded so that it could be transported easily. View on Ohio Memory.
Image ID: AL03565
Subjects: Presidents--United States; Ohio History--Presidents and Politics; Industrialists--Ohio; Inventors
Places: Pecktonville (Maryland); Pecktonville (Maryland)
 

Description: Close up view of President Warren G. Harding and other diners in the dining tent that was set up during a camping trip taken by rubber manufacturer Harvey Firestone, inventor Thomas Edison and automobile manufacturer Henry Ford in 1921. This trip was one of many that Ford, Firestone, and Edison took together between 1916 and 1924. Harding was invited to their camping trip in Maryland in July of 1921, which became known as "Camp Harding." The circular dining table was nine feet in diameter and had a Lazy Susan on the top so that diners could reach any of the dishes they wanted. It also folded so that it could be transported easily. View on Ohio Memory.
Image ID: AL03566
Subjects: Presidents--United States; Ohio History--Presidents and Politics; Industrialists--Ohio; Inventors
Places: Pecktonville (Maryland); Pecktonville (Maryland)
 

Description: Reproduction of a portrait of inventor Orville Wright from Dayton, Ohio, ca. 1900-1910. Orville and his brother Wilbur built and flew the first mechanically powered airplane. Orville was born on August 19, 1971 in Dayton, Ohio and died at age 76 on January 30, 1948 in Dayton, Ohio. View on Ohio Memory.
Image ID: AL02665
Subjects: Montgomery County (Ohio); Ohio Economy--Science and Technology; Inventors--Ohio
 

Description: Powel Crosley Jr. of Cincinnati, pictured with the wireless crystal radio set that he perfected and manufactured, 1938. The stuffed toy dog on his lap was a company mascot known as the "Crosley Pup." Powel Crosley, Jr. was born in Cincinnati, Ohio, on September 18, 1886. He manufactured radios, cars, refrigerators and other appliances. He purchased the Cincinnati Reds professional baseball team, and is the namesake for Crosley Field. He died March 28, 1961. View on Ohio Memory.
Image ID: AL02677
Subjects: Hamilton County (Ohio); Ohio Economy--Business; Inventors -- Ohio; Manufacturing industries--Ohio;
Places: Cincinnati (Ohio); Hamilton County (Ohio)
 

Description: Portrait of Charles M. Hall (1863-1914), ca. 1890. A graduate of Oberlin College, Hall discovered the electrolytic method of producing aluminum cheaply for commercial use in 1886. He began working for the Pittsburgh Reduction Company, later known as the Aluminum Company of America, and became vice president in 1890. View on Ohio Memory.
Image ID: AL03886
Subjects: Oberlin College; Ohio Economy--Science and Technology; Inventors--Ohio