dip needle

Two compasses, viz., a common compass and a dipping needle.

The amount of dipping increases as a dip needle is taken closer to the earth's magnetic poles.

The bowl for the opium was made of gold, as were the dipping needle and the scissors for cutting the bricks into pills.

In 1834 Fox constructed an improved form of deflector dipping needle compass, or dip circle, for polar navigation.

"Description of a New Dipping Needle.

"Experiments on the Dipping Needle, Made by Desire of the Royal Society."

He invented an improved version of the Dipping Needle Deflector, a navigational aid for polar explorers.

A dip needle dips more than usual at a given location if magnetic materials, such as steel cables or cast-iron pipes, are just below the earth's surface.

Dip needle survey, deposit MA 3, Anglo-Canadian pulp & paper mills ltd, 2 pages.

The Sandia National Labs design employs a dipping needle that punctures a sample cell and discharges the spark simultaneously.

Please copy/paste the following text to properly cite this HowStuffWorks article: "Dip Needle" 25 August 2009.

Electromagnet How Magnets Work Dip Needle What if I forgot to remove a piercing before an MRI?

Dip Needle Dip (or Dipping)Needle, an instrument used to measure the earth's magnetism and to detect underground magnetic materials.

Passing a small compass over the terrella, Gilbert demonstrated that a horizontal compass would point towards the magnetic pole, while a dip needle, balanced on a horizontal axis perpendicular to the magnetic one, indicated the proper "magnetic inclination" between the magnetic force and the horizontal direction.

Another important improvement to the instrument was developed in the 1830s by the Dublin Physicist Humphrey Lloyd, who devised a way of attaching a magnetic needle at right-angles to the dip needle in order to measure the intensity of force (by seeing the extent to which the right-angle needle deflected the dip-needle).