I'm with you Dan. By the time I graduated in Physics, I didn't need the slide rule to do multiplication or division and getthe first 3 digits right. Regards, Bob S.
On Tue, May 3, 2011 at 8:24 PM, Daniel J. Matyola <[email protected]> wrote: > 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 <[email protected]> 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 >>> <[email protected]> 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 >>> > [email protected] >>> > 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 >>> [email protected] >>> 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 >> [email protected] >> 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 > [email protected] > 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 [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
