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A partially disassembled Curta calculator, showing the digit slides and the stepped drum behind them Curta Type I calculator, top view Curta Type I calculator, bottom view. The Curta is a hand-held mechanical calculator designed by Curt Herzstark. [1] It is known for its extremely compact design: a small cylinder that fits in the palm of the hand.
Curta (Type I) mechanical calculator shown in the operational position (left hand). The crank is turned with the right hand. Curt Herzstark at the 1910 office equipment exhibition in Vienna. Curt Herzstark (January 26, 1902 – October 27, 1988) was an Austrian engineer. During World War II, he designed plans for a mechanical pocket calculator ...
The Davis Dam test requires the vehicle to climb the grade on Route 68 between Bullhead City and Golden Valley, Arizona, a climb of 3,500 ft (1,100 m) in 11 miles (18 km), starting at 100 °F (38 °C), with the air-conditioning on full.
Nestled between Islewood Drive and Richbarn Road, the $17,500 property seemed ideal. “We really wanted to have some privacy, not be stranded out in the country,” Donna Hartl told News Channel ...
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For 40 years, [57] the arithmometer was the only mechanical calculator available for sale and was sold all over the world. By 1890, about 2,500 arithmometers had been sold [ 58 ] plus a few hundreds more from two licensed arithmometer clone makers (Burkhardt, Germany, 1878 and Layton, UK, 1883).
Zar Points (ZP) is a statistically derived method for evaluating contract bridge hands developed by Zar Petkov. The statistical research Petkov conducted in the areas of hand evaluation and bidding is useful to bridge players, regardless of their bidding or hand evaluation system.
The stepped reckoner or Leibniz calculator was a mechanical calculator invented by the German mathematician Gottfried Wilhelm Leibniz (started in 1673, when he presented a wooden model to the Royal Society of London [2] and completed in 1694). [1]
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