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This is a list of objects of His Dark Materials trilogy of novels by the fantasy fiction author Philip Pullman.
Contents
1 Alethiometer
2 ?sah?ttr
3 Intention craft
4 Amber spyglass
5 Lodestone resonator
6 References
7 External links
//
Alethiometer

The alethiometer, as depicted on the cover of Northern Lights
An alethiometer is a device which measures the truth. The word comes from the Greek al?theia (???????) for "truth", and meter for measure so alethiometer literally means truth measurer. A misunderstanding over the author's early title for the trilogy ("The Golden Compass"), and the resemblance of the device to a large navigational compass caused the American publishers of the first book, originally entitled Northern Lights, to retitle that book The Golden Compass. It is described in Northern Lights thus:
It lay heavily in her hands, the crystal face gleaming, the golden body exquisitely machined. It was very like a clock, or a compass, for there were hands pointing to places around the dial, but instead of the hours or the points of the compass there were several little pictures, each of them painted with extraordinary precision, as if on ivory with the finest and slenderest sable brush. She turned the dial around to look at them all. There was an anchor; an hourglass surmounted by a skull; a chameleon, a bull, a beehive...Thirty-six altogether (...)
To use the alethiometer, the user directs three needles to lie over certain symbols on the face of device, and forms a question in his or her mind. The fourth needle then responds to the question, swinging over different symbols to form answers. Any given symbol may have numerous meanings.There are thirty-six symbols altogether on the alethiometer.The user needs a special form of focus to make the alethiometer work. When the user has the three needles set and the question in mind, the fourth hand will begin to move, going through a sequence of movements over each symbol related to the answer, sometimes quivering to indicate the meaning (Lyra once described the alethiometer as having various "rungs" of meaning, each quiver being one rung). The fourth arrow will continue to spin around and repeat the sequence until the user breaks focus, whereupon the reader is to use the symbols to determine the answer. The compass provides its answers through the influence of Dust (dark matter). A skilled user can use the alethiometer to answer any question on any past and present events, but the alethiometer is not capable of predicting future events, although it can project to a limited extent as to what would happen if certain actions are taken (such as the effects of leaving the underworld on the ghosts that later did so).
The actual mechanism of the device is shadowed in mystery. The original prototype was designed to track the motions of the planets as a compass tracks magnetic north; the free floating needle was intended to track the movements of the heavenly bodies such as Venus or Mars instead of tracking north and south. However this original intention failed. Lyra believes that the free floating needle's movements, caused by interaction with Dust particles, are similar to the interaction of a Crookes radiometer and photons.
A scholar who has mastered the art of reading the alethiometer is referred to as an alethiometrist; notable alethiometrists include Fra Pavel, Teukros Basilides, and the Master of Jordan College, who gives the college's alethiometer - a present from Lord Asriel - to Lyra Belacqua. Lyra is able to use it by intuition, rather than the many years of study normally required, although by the end of the trilogy she has lost this ability.
?sah?ttr
?sah?ttr [?a?s.(a.)?a?t.?], which means "Os's-threats" or "threats at God", is the Icelandic name of the subtle knife. Its other name in Hellic is teleutaia makhaira: "lattermost sword".
A knife with a double-edge, the ?sah?ttr possesses one edge of keen steel, which can cut through any physical material. The other edge is even sharper, extending to a point so fine that the eye can not see it. This edge is able to search out gaps in the fabric of space and thus cut through the fabric of the universe and into others, referred to in the books as other worlds. No known material can resist the knife, although it will break should its wielder attempt to use it whilst thinking about a person they love. The characters believe that this is because the knife is incapable of cutting through love.
The knife was made by philosophers of Cittazze, who cut many windows in their world. It was won in a fight by Giacomo Paridisi, who lost the two smallest fingers on his left hand obtaining it. He hid in the Torre degli Angeli from the insurgence of Spectres in his world, for many years protecting the knife. A young Cittazze man named Tullio tried to take it from him, but Will...(and so on)

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