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The Oil City North Side Historic District, also known as Cottage Hill, Palace Hill, and Polish Hill, is a national historic district that is located in Oil City, Venango County, Pennsylvania. Situated directly north of the Oil City Downtown Commercial Historic District , it was added to the National Register of Historic Places in 1999.
The Oil City South Side Historic District, also known as Venango City and Laytonia, is a national historic district that is located in Oil City, Venango County, Pennsylvania, and is situated directly south of the Oil City Downtown Commercial Historic District. It was added to the National Register of Historic Places in 1997. [1]
The oil level is a little low now to compensate for expansion when heating commences. The Thiele tube, named after the German chemist Johannes Thiele, is a laboratory glassware designed to contain and heat an oil bath. Such a setup is commonly used in the determination of the melting point or boiling point of a substance.
The diagram shows a typical reflux apparatus. It includes a water bath to indirectly heat the mixture. As many solvents used are flammable, direct heating with a Bunsen burner is not generally suitable, and alternatives such as a water bath, oil bath, sand bath, electric hot plate or heating mantle are employed. [6]
Overheating the oil bath can result in a fire hazard, especially if mineral oil is being used. Generally, the maximum safe operating temperature of a mineral oil bath is approximately 160 °C (320 °F), the oil's flash point. Mineral oil cannot be used above 310 °C (590 °F) due to the compound's boiling point.
Oil production peaked the late 1880s and has declined greatly since, although a few operating wells are still located in the park. [2] With oil declining in importance, the Oil Creek area settled into an era of slower growth, with lumber eventually returning as its major industry until the hills and valleys were clear cut. Oil Creek State Park ...
The first plans for the bath house began in March 1903 with Henry W. Oliver. [2] Oliver was an Irish immigrant who served in the Civil War fighting for the Union.Following the war, Oliver became a wealthy Pittsburgh based industrialist with stakes in the Iron, Coal, Steel, Tin, and Railroad industries.
Notable buildings include the General Telephone Company Building (1942), Trinity Methodist Episcopal Church (1924), the Oil City Boiler Works, Downs Block (1894), Veach Block (1896, 1913), the Drake Building (1928), and the Oil City National Bank (1926). [2] It was added to the National Register of Historic Places in 1997. [1]