Standard weinhold's lecture pattern balance arrangement.
Comprising 4 different shaped vessels, with identical bases which may be
screwed in to the out let valve. The valve has an accurately ground disc
flexibly mounted at one end of a beam, which in turn is carried on a pair of
adjustable point pivots. The other end of the beam is provided with a scale
pan. An index pointer is provided for the liquid level in the vase. The
apparatus is mounted on a wooden base. complete with resorvoir.