View of switchboard room, North Wing, Main Library, Detroit Public Library, showing switchboard equipment. Printed on front: "Detroit Library Commission. Addns & alterations to Main Public Library. Bryant & Detwiler Company, contr. Descr. floor A, switchboard room, N. Wing. No. 76. Date: 8-7-61. Win Brunner, photo." Handwritten on columns: "N20; N21."
