The Council shall determine its own rules and order of business and shall keep a written or printed journal of all its proceedings in the English language which shall be signed by the President of the Council and the City Clerk. The vote upon the passage of all ordinances, and upon the adoption of all resolutions, shall be taken by "Yes" and "No" votes and entered upon the record, except that where the vote is unanimous, it shall only be necessary to so state. Each member of the Council, who shall be recorded as present, shall vote on all questions decided by the Council unless excused by the unanimous consent of the members present, but no Councilman shall vote on any question in which he has any financial interest other than the common public interest.