Any such street railway company, corporation or individual, as mentioned in RCW 81.64.140, failing to comply with the provisions of RCW 81.64.140, shall forfeit and pay to the state of Washington a penalty of not less than fifty dollars nor more than two hundred and fifty dollars for each and every violation of RCW 81.64.140, and each period of ten days that any such company, corporation or individual shall fail to comply with the provisions of RCW 81.64.140, or for each car used by such corporation, company, or individual not in conformity with RCW 81.64.140, shall be taken and deemed to be a separate violation of RCW 81.64.140.