American Waterworks Association. The thirty-first annual convention of the American Water Works Association will be held in Rochester, N. Y . June 6 to 10, 1911. Rochester has the reputation of being the greatest convention city in this state, which is one of the reasons that warrant a large attendance at this meeting. Other features are promised which will doubtless cause the attendance to surpass any previous annual convention of the association, which is growing numerically stronger each year. A very profitable and entertaining program of pleasure is being arranged to intersperse the convention proceedings.