while time has not permitted an examination of all of said citations , many of them have been examined , and it can be confidently asserted that said cases which are cited in support of the assertion that , `` the necessity and expediency of exercising the right of eminent domain are questions essentially political and not judicial , '' show clearly and invariably that in each case the legislature itself usually , by a special law , designated the particular case in which the right of eminent domain might be exercised by the particular municipal corporation or entity within the state .