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Timeline of united states inventions (before 1890)Timeline of united states inventions (before 1890)







  • Timeline of united states inventions (before 1890)

    An octant, also called "reflecting quadrant", is a measuring instrument used primarily in navigation.it is a type of reflecting instrument that uses mirrors to reflect the path of light to the observer and, in doing so, doubles the angle measured. this allows the instrument to use a one-eighth circle arc to measure a quarter circle or quadrant.

  • Timeline of united states inventions (before 1890)

    An octant, also called "reflecting quadrant", is a measuring instrument used primarily in navigation.it is a type of reflecting instrument that uses mirrors to reflect the path of light to the observer and, in doing so, doubles the angle measured. this allows the instrument to use a one-eighth circle arc to measure a quarter circle or quadrant.