Because of their graphical anologue nature, nomograms share with slide rules the ability for users to see at a glance the extent by which given changes in...
I just want to add one more reference to this topic. Burrows, Walter Herbert; 'Graphical Techniques for Engineering Computations' Macmillan; London; 1965 ...
I've forgotten most of the rules of thumb for placing the decimal point for calculations using the various scales, so I fall back on the simple expedient of...
Thanks for all the good answers. I'll have to sit down and work some problems and try the method. That it is of limited value must explain why my later 1441...
You are correct sir, as far it as goes, but you have conflated two of my statements without some vital ancillary information. I am a software developer. I...
I just round the numbers to find an approximation. 4.11 X 0.126 gives an SR result made of the digits 518. I try mentally 5 X 0.1 = 0.5 and thus the real...
zvidoron@...
May 1, 2009 3:32 pm
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Hi, Dan, if you want an interesting slide rule for computation, try the Pickett 1010 SL. This 20 scale non-log-log rule, this one is very efficient to use. ...
On May 1, 2009, at 9:49 AM, jon_chandler_jones wrote: ... ... Jon, When I was in the Navy Reserves our helicopter squadron had an odd collection of officers....
I laughed quite loudly at your account of the astrological physicist. Possibly part of his pain was the first few times that happened, and he said "no...
Excellent. I'll also have to order the one that says "I void warranties." The description on the site fits me, and I suspect a few others on this board, to a...
Some time ago I came across a website which features a chronology of Faber Castell case styles. I foolishly neglected to bookmark it and now can't find it. Can...
Hi Folks: Here's the past week's top 40 completed eBay slide rule auctions (as of today). Have a good weekend, Dave For direct links, go to this page and...
My ebay purchased Picket N-515-T electronic slide rule arrived today. As they'd say in the 1960's movies, Its gonna be a swell gadget! The on-line copy of the...
I am all in favor of mental short cuts and mentally computed approximations in determining the location of decimal points, as long as you KNOW the method you...
Hi Donald, I agree with you about the difficulty of using approximations and the method I use is basically the same as yours, but I find it easier to just do...
I have used the scientific notation approximation for years and don't recall a failure. This avoids what I call mental gymnastics in determining the decimal...
Hi Marion, Things do get more complicated if you use the CF, DF, CIF scales. In that case, fall back to the more general rules than the ones I gave earlier...
Hi, I would like to pick your minds. As an inroad to discussing calculating machines, I want to set up a demonstration of a slide rule (or other manual...
Douglas: The best way I know to show of the advantage of a slide rule is to use the kind of problem at which it excels, and that would be in figuring...
... Like you, I use the folded and inverse scales wherever possible to minimize slide movements. In many cases, the placing of the decimal point is known by...
I just finished grading a bunch of tests. I had to convert scores out of 85 to percentages. Easy with a slide rule: C 85 over D index; find percentage on D...
Douglas, I can think of some problems where proportion is very fast on a slide rule but not on a calculator. But, this is probably more than you are asking...
Mark, your percentage calc is a simple proportion. C(85)/D(100%)= C(score)/D(score%). This is case where if you know any two values, you can find the third...
Steve, knowing the order of magnitude is one part of the problem. Having a general idea of the range of the answer provide some more confidence that your slide...
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