[Leica] Old stuff

[Jim Nichols]

I can match you with a IIIa, IIIf and both slide rules.  Never used a 
circular rule.

My 10" rule is a K&E Trig, because the college bookstore was sold out of 
Deci-Trig rules.  My small one is a yellow P&E that served me many 
nights before our wind tunnels got true digital instrumentation.  And 
not a battery to be found in any of them.

Jim Nichols
Tullahoma, TN USA

On 11/3/2015 10:44 AM, Larry Zeitlin via LUG wrote:
>   The discussion and photos of the Babbage Differential Engine of a couple of weeks ago prompted me to dredge the pictured 50+ year old artifacts from the bottom drawers of my desk. Many more are still interred there. All still work as well as they did when they were new. No batteries are required. Bear in mind that most of the bridges, all of the WW2 airplanes, and all Leica lenses prior to the Summicron were designed using slide rules and mechanical calculators. Will the Leica SL still work in half a century?
> http://gallery.leica-users.org/v/Larry+Z/Old+stuff.jpg.html
> Larry Z
>
>
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