Science & Medicine - line art (Scientific) Astronomy Gunner`s Quadrant A device placed in the gun barrel, which along with a plumb line helped gunners adjust the aim of their cannons by measuring the elevation. elevation altitude, war, trajectory, artil

Science & Medicine - line art Astronomy An Orrery - a clockwork model of the solar system named after the fourth Earl of Orrery in England for whom one was made. The movement demonstrated the revolution of the planets around the sun.

Science & Medicine - line art (Scientific) Astronomy An Orrery - a clockwork model of the solar system named after the fourth Earl of Orrery in England for whom one was made. The movement demonstrated the revolution of the planets around the sun.

Science & Medicine - line art (Scientific) Geography/Astronomy Analemma Showing the time of Sun rising and Sun setting, the length of the Days & Nights, and the point of the Compass on which the Sun rises & sets, for every Degree of Latitude, and for ev

Science & Medicine - line art (Scientific) Astronomy Hadley`s Quadrant This device was invented in 1730 by English mathematician John Hadley (1682-1744) who also produced the first practical reflecting telescope that could be used in astronomy. This devi

Science & Medicine - line art (Scientific) Astronomy Davis`s Quadrant John Davis (1550-1605) was an Englishman who searched for the famed Northwest Passage. He commanded a ship alongside Sir Walter Raleigh in the battle with the Spanish Armada in 1588 an

Science & Medicine - line art (Scientific) Astronomy Celestial sphere