This Octant is a replica of the one invented by John Hadley mathematician and English optical mechanic at the beginning of the XVIII century.
Jhon Hadley was born in London in 1682 and he had already demonstrated his enthusiasm and great ability with mathematics since he was a child. In 1717 he founded his first workshop dedicated to the manufacture of scientific instruments entering for that reason into the English Royal Society of the time.
In 1719 Isaac Newton, surprised with the work he was doing in his workshop, commissioned him the first reflection telescope, finishing it in January 1721 with spectacular results, since by far he had built the best telescope known until that moment.
In 1730 he invented the octant, whose repercussion on navigation was immediate.
The arc corresponding to an octant is 45º, that is to say the eighth part of the circle and hence its name comes from. When the instrument consists of a sixth part of the circle, in that case it is called sextant. Both the Octant and the Sextant are quadrants of reflection.
It is made of walnut and polished brass and is fully functional.
It is accompanied with a brief brochure and we give instructions for tutorials on the Internet to learn how to use it.
Hight: 33 cm
Widht: 30 cm
Thickness: (Including mirror) 12 cm