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  2. John Deere World Headquarters - Wikipedia

    en.wikipedia.org/wiki/John_Deere_World_Headquarters

    The John Deere World Headquarters is a complex of four buildings located on 1,400 acres (570 ha) of land [1] at One John Deere Place, Moline, Illinois, United States. [2] The complex serves as corporate headquarters for agricultural heavy equipment company John Deere .

  3. Barometer - Wikipedia

    en.wikipedia.org/wiki/Barometer

    Using vacuum pump oil as the working fluid in a barometer has led to the creation of the new "World's Tallest Barometer" in February 2013. The barometer at Portland State University (PSU) uses doubly distilled vacuum pump oil and has a nominal height of about 12.4 m for the oil column height; expected excursions are in the range of ±0.4 m over ...

  4. Standard Vacuum Oil Company - Wikipedia

    en.wikipedia.org/wiki/Standard_Vacuum_Oil_Company

    A letter from my father to T. E. Mobley of Standard Vacuum in June 1942 . . . reported that the Yu Men wells then had a capacity of about 1,000 barrels of oil and 10,000 gallons of gasoline a day, except in winter when cold weather caused the oil to congeal. This was the first major oil field in China.

  5. Pressure measurement - Wikipedia

    en.wikipedia.org/wiki/Pressure_measurement

    A vacuum gauge is used to measure pressures lower than the ambient atmospheric pressure, which is set as the zero point, in negative values (for instance, −1 bar or −760 mmHg equals total vacuum). Most gauges measure pressure relative to atmospheric pressure as the zero point, so this form of reading is simply referred to as "gauge pressure".

  6. Excavator controls - Wikipedia

    en.wikipedia.org/wiki/Excavator_controls

    This control pattern is standardized in J1814 [dubious – discuss]. In the SAE control pattern, the left hand joystick controls Swing (left & right) and the Main Boom (up &down), and the right hand joystick controls the Stick Boom(away & close) and Bucket motions (close & dump). Left hand left = Swing left. Left hand right = Swing right.

  7. Barometer question - Wikipedia

    en.wikipedia.org/wiki/Barometer_question

    Tying a piece of string to the barometer, lowering the barometer from the roof to the ground, and measuring the length of the string and barometer. Dropping the barometer off the roof, measuring the time it takes to hit the ground, and calculating the building's height assuming constant acceleration under gravity.

  8. Pressure altimeter - Wikipedia

    en.wikipedia.org/wiki/Pressure_altimeter

    In aircraft, an aneroid altimeter or aneroid barometer measures the atmospheric pressure from a static port outside the aircraft. Air pressure decreases with an increase of altitude—approximately 100 hectopascals per 800 meters or one inch of mercury per 1000 feet or 1 hectopascals per 30 feet near sea level .

  9. McLeod gauge - Wikipedia

    en.wikipedia.org/wiki/McLeod_gauge

    A glass McLeod gauge, drained of mercury. A McLeod gauge is a scientific instrument used to measure very low pressures, down to 10 −6 Torr (0.133 mPa).It was invented in 1874 by Herbert McLeod (1841–1923). [1]