A capillary type viscometer similar to that shown in Fig. $2\mathrm{.}7$ is being used to measure the viscosity of an oil having a specific gravity of $0\mathrm{.}90.$ The following data apply:

Tube inside diameter $=0\mathrm{.}100$ in $=D$

Length between manometer taps $=12\mathrm{.}0$ in $=L$

Manometer fluid $=$ mercury

Manometer deflection $=7\mathrm{.}00$ in $=h$

Velocity of flow $=4\mathrm{.}82f\frac{t}{s}=v$