Thread: Laser levels - why not just use a ball of string?
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Douglas de Lacey Douglas de Lacey is offline
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Default Laser levels - why not just use a ball of string?
wrote:
Laser levels - why not just use string?

"There is no force, however great,
Can stretch a cord, however fine,
Into a horizontal line,
Which is accurately straight"
(W Whewell, Elementary Treatise on Mechanics 1st ed, p 44).

Douglas de Lacey
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