An optical product useful for watching items far below the area of liquid.
A device for seeing objects below the area associated with the liquid.
a musical instrument built to mark the current presence of water, particularly in environment.
A kind of water-clock, used anciently for measuring time, the water tricking from an orifice at the end of a graduated tube.
A kind of water-clock or instrument formerly employed for measuring time, comprising a cylindrical graduated pipe, form which water gradually escaped through an aperture inside conical base, the subsidence of the water establishing the lapse period.
An apparatus for observing objects when you look at the water or on sea-bottom.