$3\mathrm{.}59"$ A vertical conduit is carrying oil $(S=0\mathrm{.}95).$

A differential mercury manometer is tapped into the conduit at points A and $B.$ Determine the difference in pressure between A and $B$ when $h=3in.$ What is the difference in piczonetric head between A and $B?$

PROBLEM $3\mathrm{.}59$