I disagree. Back in my days as a physics major and then as a navigator, I had a number of slide rules, in both the linear style and the circular style. None were designed to do addition (or subtraction). They could perform those operations only by indirect means, such as converting the problem first into one of division, or by using the L scale back and forth, and reading the result at the zero mark.
I would never say that addition is easy on a slide rule; quite the contrary. I certainly dispute the statement " that's what they do best." Dan On Tue, May 3, 2011 at 9:06 PM, John Francis <jo...@panix.com> wrote: > > Actually, adding on a slide rule is really easy - that's what they do best. > > The problem is that the example shown doesn't have linear scales (or, to be > pedantic, it only appears to have one, and the cursor doesn't cover it). My > (double-sided) slide rule has rather more scales than that, including linear. > > (IIRC, a single linear scale is often labelled as the 'L' scale) > > > On Tue, May 03, 2011 at 08:25:25PM -0400, Daniel J. Matyola wrote: >> Adding on a slide rule is a bit tricky.<G> >> >> Dan >> >> On Tue, May 3, 2011 at 6:41 PM, Collin Brendemuehl >> <coll...@brendemuehl.net> wrote: >> > Parent >> > http://brendemuehl.net/images/adder1.jpg >> > >> > and child >> > http://brendemuehl.net/images/adder2.jpg >> > >> > (The thing is, I really think highly of myself with pictures of this >> > calibre.) >> > >> > Sincerely, >> > >> > Collin Brendemuehl >> > http://kerygmainstitute.org >> > >> > "He is no fool who gives what he cannot keep to gain what he cannot lose" >> > -- Jim Elliott >> > >> > >> > >> > >> > >> > >> > -- >> > PDML Pentax-Discuss Mail List >> > PDML@pdml.net >> > http://pdml.net/mailman/listinfo/pdml_pdml.net >> > to UNSUBSCRIBE from the PDML, please visit the link directly above and >> > follow the directions. >> > >> >> >> >> -- >> Dan Matyola >> http://www.pentaxphotogallery.com/danieljmatyola >> >> -- >> PDML Pentax-Discuss Mail List >> PDML@pdml.net >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. > -- Dan Matyola http://www.pentaxphotogallery.com/danieljmatyola -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
