$3-42$E The pressure in a natural gas pipeline is measured by the manometer shown in Fig. $P_3-42E$ with one of the arms open to the atmosphere where the local atmospheric pressure is $14\mathrm{.}2$ psia. Determine the absolute pressure in the pipeline.

FIGURE $P_3-42E$

$3-43$E Repeat Prob. $3-42$E by replacing air by oil with a specific gravity of $0\mathrm{.}69.$