Scope and ContentK&E. How to Take Care of Your Slide Rule. Issued by Keuffel & Esser Co., Morristown, N.J., circa 1968-1972. Copyright 1962. Pamphlet, 2-7/8" high x 4" wide, [12] pages. The cover depicts the Deci-lon 68 1100 slide rule which was introduced in 1962. This manual was apparently first issued in 1962 and prior to 1968; it would have had the same appearance as well as having New York and Hoboken listed on it. While not issued in Hoboken, it may have been prepared or produced in Hoboken prior to the move to Morristown. Note the branch offices no longer appear on the printed item. See archives 2010.023.0003 for a ca. 1962 issue.