How.is standard electrode potential of zinc electrode measured by using standard hydrogen electrode?

Explanation

Half cell whose`E_(cell)^(0)` to be measured is coupled with SHE through the salt bridge.
Emf of galvanic cell is measured ` (E_(cell)^(0))`.
As  `E_(cell)^(0)`, using the equation ` E_(cell)=E_(R)^(0)-E_(L)^(0)` or
  `E_(cell)^(0)= E_(SHE)^(0)-E_(Zn)^(0)`.The `E_(Zn)` is measured.