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ѱ ô ϵ ǽõǰ ־ 츮 ϰ ؼ Ȯ ִ. () ǥô ô() ߱ ô Ͽ ãƺ ִ...

Gunter`s chain̶ .
ǿ ݱ ϰ ϰ ִ Ÿ ⱸ.


BC 1400濡 踦 ߴٴ Ű Ʈ ߿ ߰ߵǾ. BC 3 ߱ε õ ڼ ڱ ˰ ־, ڼ ħ ־. BC 2 ׸ε κ ϱ ⱸ...
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1789 ϰ ȥ ü踦 10 ʸ ο ü üϵ ŷеǴ ߴ.1791 ȸ ī Academie des Sciences(1662~1793) Ͽ Կ ϵ ߴ.

η Ȱ ȯ Ҿ ° ܳ Ǿ. ̿ κ ü а̾. հ ̳ չٴ, ̵ ۵ Ҿ ܳ ...

ü Ͽ ߴ ⺻ôμ ѱ ߰ߵ ô ߿ 츮 ڷμ , Ŷ, ׸ Ϻ θ Ǿ. ô .... ô븦 .翡 ̸ 1ô 22~30cmı ߱ô õ ٸ ô ̴.