I just finish buying a real doozie ! The name of the book is Nomography and Empirical Equations (2nd Edition) by Dale S. Davis for $69 USD in Amazon.com, they...
Hi Mau, The book was due out on October 30th 2009. It can be seen at amazon.co.uk but no mention of it yet at amazon.com Looking at the publisher's site,...
Hello Mau Sometime ago we discussed here about nomography. I don't remember all the details, but if you seach the archive you should find them. Included was a...
Is this a version of Newton's polynomial solver? The diagonal string coming from the drum on the right sort of points it in that direction. Is there more info...
Note that Sqrt (10) was a long-accepted approx. for pi, going back to the ancient Hindu mathematicians. The error sqrt(10) - pi ~ 0.02069, or ~0.658% of the...
There's mention of a "ganged slide-rule extrapolator" here: www.nap.edu/html/biomems/cabbot.pdf adsabs.harvard.edu/full/1923PPCAS...8...55S The descriptions...
Hi Cyron, The only advantage that I can see in having the scales folded at sqrt(10) is that it allows chained computations to be done with generally smaller...
Does anyone have a good recommendation how to undo slight scratching on the metal ends of a slide rule? I have a polishing compound for polishing out...
It seems to a kind of Nomogram or a slide rule to solve a system of linear equations to calculate: Newton slide rule to calculate Ax3+Bx2+Cx=D such as this...
... My believe, was slide Rules *were* once quick tools for checking answers. I remembered that there were 10 figure tables (all the mantissa are corrected to...
There are some "rules" for the digits when using D/C/CI. Usually I do calculation on D/C/CI. But I may use CF/CIF once only to read the answer on DF (final...
See messages # 36583 and 36596 for the rules I use in placing the decimal point. Note that these rules apply even if multiplying by dividing by CI (CIF) or...
John, I don't know what to recommend for scratches except possibly a fine ScotchBrite pad. I have used NeverDull polish (available in auto parts stores)...
I've used a wire brush on Picketts, although this is not really removing scratches, more like creating thousands more! Still, it gave it a brushed look that I...
Ebay item #380175405160 claims to be from 1900 - I know that is wishful thinking, but isn't this one of the later improved cursors that don't suffer from...
There were about a million rules with the 1900 patent date and every eBay seller claims that was when it was produced. Rules all the way up to 1936 had this...
Actually the freedom from the restrictions (choice in use) you mention below are the very same restrictions that Johnson mentions in his classic book. Further...
In fact, the really useful McCoy site shows the 4055 as being manufactured from 1927 until 1943: http://mccoys-kecatalogs.com/KEModels/ke4055family.htm Patent...
Bob, I've got a pdf of Johnson's book on my computer, but have never gotten around to reading it (it's one long pdf, not separate pages and comes out sideways...
I don't know if I misunderstand your method. (I read some books many years ago, but forget the exact detail, though I can recall that method, and it was not...
I'm going to answer my own question. I know that you do not want to be too vigorous in dealing with scratchs on this particular metal surface. I tired some...
The solution only has 2 digits because you must add in the -1 correction which occurs because the product lies to the right of the first factor, but is on the...
... Or you can click Adobe Reader's "rotate right" (Ctrl-Shift-'+') or "rotate left" (Ctrl-Shift-'-') buttons. -- Stefan Vorkoetter http://www.stefanv.com...
Hi, I just came across a very affordable slide rule watch from Invicta that looks exactly like CItizen's Nighthawk and costs USD 70 with shipping! Unlike...
Having problems with message search?
Fill out this form to ensure your group is one of the first to be migrated to the new message search system.
