" [8] We have also expressed our opinion relative to an emergency clause, in the following language in Spokane County v. Certain Lots in Spokane, 153 Wn. 462, 279 P. 724, quoted from the early case of Heilig v. City Council of Puyallup, 7 Wn. 29, 34 P. 164: "'But we are also of the opinion that where two conflicting acts upon the same subject-matter are passed at the same session of the legislature, and their conflict is such that they cannot be harmonized and stand together, and one of them contains an emergency clause and the other does not, that one containing the emergency clause must be taken to overcome the other.