Searle's pattern, spirit level mounted in two rectangular cast iron frame with one end resting on point of micrometer screw, fitted in one frame, the second end of spirit level pivoted in the second frame. The micrometer is provided with vertical scale 10mm on either side of the zero and Vernier reading 0.01mm, complete with ceiling bracket having two self centering chucks and tension weight. The apparatus is black stove enamel finish in nicely finished case.
To show that the level liquid in communicating vessels in constants irrespective of the size of shape of the vessels. Comprising four glass tubes of differing shaped and cross-sectional area projecting vertically from a common horizontal tube. Mounted on a base 230x100x22mm approx., overall height 160mm.
