Surveying
The cross hairs in the surveying telescope are placed

midway between eye piece and objec-tive lens
anywhere between eye-piece and objective lens
much closer to the objective lens than to the eye piece
much closer to the eye-piece than to the objective lens

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Surveying
Accidental errors

All of these
Do not follow any definite mathematical law
Cannot be removed by applying corrections to the observed values
Are generally small

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