Contained in this series are correspondence, programs, announcements, and guest lists of the three School of Mines anniversary celebrations: the 50th anniversary in 1914, the 75th anniversary in 1938, and the 100th anniversary in 1964. The majority of this series resides in the 50th and 75th anniversary materials. The 50th anniversary celebrations included a banquet, convocation, an alumni luncheon, campus night, and commencement. Banquet materials consist of correspondence, menus, programs, guest lists, and announcements. Programs, admission tickets, invitations, and announcements represent the other 50th anniversary celebration events. The remaining 50th anniversary material consists of celebration badges; general correspondence; meeting minutes of the anniversary celebration committee; news clippings; financial papers including bills, reservations, and correspondence; poems and songs written for or performed at the celebrations; commemorative issues of campus publications; and copies of speeches given at the celebrations. The 75th anniversary celebrations included a dinner, convocation, an open house, "old home week" at Camp Columbia, and the unveiling of an Old School of Mines plaque commemorating the original site of the School at 50th Street and Park Avenue. Correspondence, including letters to and from President Nicholas Murray Butler; guest lists; programs; committee meeting minutes; announcements; schedules; news clippings; and commemorative issues of campus publications all compose the 75th anniversary celebration items. Three black and white photographs of the Old School of Mines unveiling ceremony are also included. The 100th anniversary celebration materials consist of a celebration badge, the centennial dinner seating list and program, convocation program and announcement, an alumni centennial questionnaire, and a speech draft for the celebration.