Compass 2
A Chinese loadstone compass (Ѻ): a loadstone spoon on a bronze plate, which aligns, when turned, with north direction of the earth's magnetic field, thus giving direction, e.g. on a ship; variants of which, supposedly, dating to the 300BC.
In materials, loadstone (TR:4), aka "lodestone", from the Greek “μάγνης” (magnes), from the Middle English “leading stone” (or course stone), meaning “journey or way”, in reference to their use, when suspended, in compasses, is the magnetite mineral, a black or brownish-black metallic luster rock-like material that tends to be magnetized and able to iron; ancient sources of loadstone were commonly found in Thessalian Magnesia, which is the root of the term “magnet” (TR:52). [1]

In c.2500BC, the Egyptians, as reported by Manetho (c.300BC), deified the explanation of the properties of loadstone as follows:[2]

“The loadstone is called, by the Egyptians, the ‘bone of Horus’, as iron is the ‘bone of Typho [Set].”

This statement means something to the effect that, as stated in modern terms, the properties of loadstone was said to the the force or "bone" or Horus, that iron was the force or bone of Set, and the two attracted each other in battle each night, or something along these lines.

In c.570BC, Thales, as discussed by Aristotle, asserted the view that loadstone attracts iron because it has a soul: [3]

“The lodestone has soul [anima, psyche, spirit, or life] as it is able to move the iron.”

In c.385BC, Plato was referring to the loadstone as the “stone of Heracles”. [4]

In 55BC, Lucretius was using the term “magnes” in the sense of “attracting stone”, also saying that the term “magnet” is from the place where it was obtained, namely: in the native hills of the Magnesians. (Ѻ)

In c.1590, William Gilbert used loadstones floated little wooden boats to conduct the first version of the floating magnets experiments.

In 1877, Helena Blavatsky, in her Isis Unveiled (Ѻ), made the connection between the magnet, Horus (i.e. bone of Horus), and Hercules (i.e. stone of Heracles).

1. Maxwell, James C. (1873). A Treatise on Electricity and Magnetism (Volume One) (pg. v). New York: Dover.
2. (a) Artistotle. (c.330BC). On the Soul (405a19) (Ѻ) . Publisher.
(b) Eells, W.C. (1962). “100 Greatest Mathematicians of All Time” (link), Mathematics Teacher, 7(55).
(c) Stokes, Philip. (2002). Philosophy 100: Essential Thinkers (pgs. 8-9). Enchanted Lion Books.
3. (a) Budge, Wallis. (1904). The Gods of the Egyptians, Volume Two (pg. 246). Dover, 1969.
(b) Manetho – Wikipedia.
4. Freeden, Willi, Nashed, Zhuair M., and Sonar, Thomas. (2010). Handbook of Geomathematics (pg. 45). Springer.

External links
Loadstone – Wikipedia.

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