Slide rule with square (large object). Instrument which was used to calculate the triangle of velocities, thus helping to determine the position of the ship. Made in 1769 by António Teixeira, in Brazil, Portuguese colony at the time. Proportional dividers, 18th century (small object). Instrument used to work out the values of trigonometrical functions, before the use of nautical tables published in books. Maritime Museum. Lisbon, Portugal.

Name: Slide rule with square (large object). Instrument which was used to calculate the triangle of velocities, thus helping to determine the position of the ship. Made in 1769 by António Teixeira, in Brazil, Portuguese colony at the time. Proportional dividers, 18th century (small object). Instrument used to work out the values of trigonometrical functions, before the use of nautical tables published in books. Maritime Museum. Lisbon, Portugal. - SuperStock
Brand: Album Archivo
SKU: 4409-65838305
Availability: InStock

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Slide rule with square (large object). Instrument which was used to calculate the triangle of velocities, thus helping to determine the position of the ship. Made in 1769 by António Teixeira, in Brazil, Portuguese colony at the time. Proportional dividers, 18th century (small object). Instrument used to work out the values of trigonometrical functions, before the use of nautical tables published in books. Maritime Museum. Lisbon, Portugal.

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