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Messages 38053 - 38082 of 38082   Oldest  |  < Older  |  Newer >  |  Newest
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38053
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...
Mau
mauricio_jav...
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Nov 5, 2009
6:27 pm
38054
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,...
rodlovett
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Nov 5, 2009
7:07 pm
38055
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...
Charles Oxford
cjoxford2
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Nov 5, 2009
7:48 pm
38056
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...
Paul Dorris
dustyxx
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Nov 6, 2009
3:55 am
38057
http://articles.adsabs.harvard.edu/full/gif/1923PPCAS...8...55S/0000061.000.html Regards, Dave S ... From: "mrklingon" <joela@...> To:...
David Smart
smartware_co...
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Nov 6, 2009
3:56 am
38058
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...
CTLPELWV@...
carbide01
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Nov 6, 2009
3:56 am
38059
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...
Stefan Vorkoetter
smvorkoetter
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Nov 6, 2009
4:23 am
38060
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...
dfsmth45
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Nov 6, 2009
5:09 am
38061
  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...
John Starr
starguy1
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Nov 6, 2009
10:51 pm
38062
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...
Mau
mauricio_jav...
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Nov 6, 2009
10:53 pm
38063
What is a "physicist's slide rule" ????...
Mau
mauricio_jav...
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Nov 6, 2009
10:54 pm
38064
... 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...
fwonghc
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Nov 6, 2009
10:54 pm
38065
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...
fwonghc
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Nov 6, 2009
10:55 pm
38066
For the Alro fans: I just put an Alro military slide rule on Ebay: auction numer 140357973759. Regards, Hubert...
Hubert
larque1957
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Nov 7, 2009
2:38 am
38067
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...
dfsmth45
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Nov 7, 2009
2:40 am
38068
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)...
dfsmth45
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Nov 7, 2009
2:44 am
38069
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...
Jon Jones
jon_chandler...
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Nov 7, 2009
4:13 am
38070
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...
Jon Jones
jon_chandler...
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Nov 7, 2009
4:13 am
38071
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...
Clark McCoy
clarkmccoy2
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Nov 7, 2009
4:55 am
38072
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...
w9ya
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Nov 7, 2009
6:30 am
38073
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...
Maynard Wright
mngwright
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Nov 7, 2009
1:23 pm
38074
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...
dfsmth45
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Nov 7, 2009
1:29 pm
38075
what about the paper trade in rule? I thought there was shortage during wartime but kercs cursors are very common....
Charles Oxford
cjoxford2
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Nov 7, 2009
2:56 pm
38076
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...
fwonghc
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Nov 7, 2009
6:30 pm
38077
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...
John Starr
starguy1
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Nov 7, 2009
6:31 pm
38078
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...
dfsmth45
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Nov 7, 2009
7:02 pm
38079
... Or you can click Adobe Reader's "rotate right" (Ctrl-Shift-'+') or "rotate left" (Ctrl-Shift-'-') buttons. -- Stefan Vorkoetter http://www.stefanv.com...
Stefan Vorkoetter
smvorkoetter
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12:16 am
38080
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...
wee-meng lee
kleewm
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12:50 am
38081
...from what I can see, it is only a tachymetre. Cyril Catt...
Cyril Catt
newcastleewc...
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12:56 am
38082
Nice pictures of a cool looking slide rule that I can't afford (currently GBP721 ~ $1200)! ebay Item number: 330372700789 --Mark...
Mark Armbrust
cadet1620
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2:20 am
Messages 38053 - 38082 of 38082   Oldest  |  < Older  |  Newer >  |  Newest
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