Chapter XLV: Section 52: Levelling and Plumbing
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The common spirit level and plumbline are ordinarily employed, as also the surveyor’s telescope and spirit level or “Dumpy.”
=986. Gravitation level.=
=987. Plumbline and square.=
=988. Water tube level;= the tube may be carried a long distance and round corners, &c., in any direction below the water level.
=989. Spirit level plumbing square.=
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The engineer's sketch-book of mechanical movements, devices, appliances, contrivances and details employed in the design and construction of machinery for every purposeChapter XLV: Section 52: Levelling and Plumbing
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