Wonder if this manual had anything to do with the design of the Titanic propellers? It's sure old enough to have been used in that time frame, or fairly close. -> -----Original Message----- -> From: owner-classiccmp(a)classiccmp.org -> [mailto:owner-classiccmp@classiccmp.org]On Behalf Of Doug Coward -> Sent: Saturday, September 08, 2001 2:08 AM -> To: classiccmp(a)classiccmp.org -> Subject: My latest find -> -> -> I've managed to push back the age of -> the oldest computer user manual in my -> collection by another 42 years. -> -> SCREW PROPELLER COMPUTER -> Geo. McDermott -> 52 pages, hardbound, first edition -> Taylor and Carpenter, 1902 -> -> This book describes a mechanical computer -> with two separate rotating discs to enter -> variables and used to calculate the dimensions -> and proportions of screw propellers -> The last chapter is entitled "Directions -> for operating the computer" with 7 example -> problems. -> Unfortunately there are no pictures of the -> computer in the book so I'll have to wait -> until the book attracts the computer. :) -> --Doug -> ========================================= -> Doug Coward -> @ home in Poulsbo, WA -> -> Analog Computer Online Museum and History Center -> http://www.best.com/~dcoward/analog -> ========================================= ->