Surveying
The rise and fall method

provides a check on the reduction of intermediate point levels
quicker and less tedious for large number of intermediate sights
is less accurate than height of instrument method
is not suitable for levelling with tilting levels

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Surveying
The cross hairs in the surveying telescope are placed

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

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