Nathan's Possibly Interesting web site http://www.nzeldes.com The personal web site of Nathan Zeldes en-us Nathan's Possibly Interesting web site http://www.nzeldes.com/images/Channel_Image.jpg http://www.nzeldes.com 90 42 Yiddish radio geeks of a bygone world http://www.nzeldes.com/Miscellany/Judischer-Radio-Amateur.htm A glimpse of Warsaw's radio amateurs in 1926. An unusual form factor http://www.nzeldes.com/HOC/JointRules.htm Two variants of joint Coggeshall slide rules compared. Leib Stern's slide rule http://www.nzeldes.com/HOC/Stern.htm A rare specialty slide rule from the USSR. Kruger's calculating pencil case http://www.nzeldes.com/HOC/Kruger.htm An endearing item from the classrooms of another era. Gunter's rule http://www.nzeldes.com/HOC/Gunter.htm The first logarithmic calculating instrument, predecessor of the slide rule. Webb's Adder http://www.nzeldes.com/HOC/WebbAdder.htm A mechanical adder with an ingenious Carry mechanism.