Post by ministry of flat earth

17EJXR…RAob Key · twetch

Water level
An old device but a simple instrument for measuring the level differences of two points. This level, is illustrated in the opposite figure. The two levelling staffs are of the same length with a graduated tape attached to each stave. The tube is filled with water. The ends of the tube are fitted with rubber stoppers to prevent loss of water. The total length of tube defines the range of the instrument

What the chain says
Block
832 479
Time
2024-02-21T08:27:44Z
Signer
17EJXRtbttFsAJvPhjdt1ZYTDikRirRAob
App
twetch
Type
post
Content type
text/plain

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