Slide Rules and Mathematics
Slide Rules and Mathematics
Science, Technology, Engineering and Mathematics- This is the way of the future.
Due to the recent pandemic, home schooling is on the rise and parents need resources in these fields. Dr. Bob presents the subjects in an understandable way, ready for students and interested viewers to not only work through the lesson, but explore further.
Dr. Bob reviews the comments on a regular basis and responds to emails with questions and requests for videos. While there will be memberships and patreons available, this information is free to all and will never be a pay to watch channel (there were also be live streams open to the public and livestreams open to channel members).
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Do they have cos / tan / arccos etc? Could they be laser printed?
I have that big Pickett model in yellow- I started college with it.
I love that you use a fountain pen to do your work. I do too. Fewr errors by thinking more.
Invert means what
I wanted to recommend a book I just bought that others watching this channel might appreciate. "A Manual of the Slide Rule: Its History, Principle, and Operation" by J.E. Thompson. It's a reprint of a book published in 1930 and available at Amazon. Lots of great information. I was particularly interested in the tables of conversions and settings for common problems. It gives a quick view into what is possible with a slide rule. I'm assuming that engineers had standard references with these settings and conversions available. If anyone can recommend a source, I'd really enjoy trying to track one down.
Thanks!
Great video! You lost me at "phone pole" though 😂
What do you mean?
@sliderulesandmathematics9232 a poor attempt at humor! No one seems to use wires for telephone communications these days. My kids didn't know what to make of a rotary dial phone! I enjoyed your video very much. Thanks!
I noticed in the instructions for the 2/83N slide rule, they mention some kind of correction mark ( on the slide rule itself) to be used for small angles. But not too sure how that works. Anyone familiar with that?
I will look. They are for min and sec of arc
I have a slide rule that used to belong to my father. He passed away several years ago, and I've changed careers towards more mathematics and science, and I wanted to learn to use that slide rule. Thank you for making all these videos about it!
Let me know if you would like to see any of them redone
In high school, we lived with our slide rule. No self-respecting person was ever without one!
Fantastic video series. Thank you so much.
Impossible to follow this guy with his super small scale and unreadable scales as well as his super rapid changing locations before one can read any of the scales. I had to use a slide rule for surveying classes in spring 1972. The number of digits were to few to get accurate values of small angles with the trig functions. We had to do calculations long hand on paper. By the way, all the Apollo moon shots used slide rules to perform almost all the calculations.
Love this one. Can you do more practical calculations?
I will probably release some more in the future.
I still have my Blundell Omega 605 - with me now for almost 60 years and it still works😂. Original leather case needs re-stitching.
Mathematical nitpick. e isn't the integral from 0 to ∞ of (1+1/n)^n, it's the limit as n -> ∞ of (1+1/n)^n.
thanks, I should have used better notation and I'm not implying it is an integral. I feel I described it correctly, but didn't use the right notation.
Very helpful. The LL scales are tough to learn
Thanks. This - like the carbon dating - helps a lot in better understanding how to use the LL scales. Also looking forward to the high-school trigonometry course. Definitively need to polish up my skills in that area 😉
Coming soon!
Master
Great video, points up what my banking employee son-in-law told my daughter. “________ we never pay interest on depreciating assets.”
Interesting
It is, isn't it?
Thank you, Bob, for your video. Albert Einstein once said that compound interest is the eighth wonder of the world. He who understands it, earns it; he who doesn't, pays it.
There are some excellent tutorials on KZread
Thank you for this great series on slide rules. It refreshed much of what I learned in the early 70's and taught me a number of things that I didn't previously know. I'll continue to follow your channel to see what you have in store for the future.
thank you. I have a couple videos to update and I'm working on the trig series. I'm back in school now and may turn some of my homework into videos. Pre Calc, Calc and Diff Eq.
@@sliderulesandmathematics9232 do some more
In the early '60s, we got three-place answers, but we had to calculate the place, 1.0, 100, or .001. Villanova had an IBM 1620, the size of an upright piano. We used punch cards and made money troubleshooting other students' errors. Now, we use a concrete slide rule for the quantities. I then enter all the numbers into a program to verify the answers. At $265 a cubic yard, we cannot error. BTW; IBM could calculate massive cut and fill jobs, and calculate the offsets, etc.
I remember walking around the U of Illinois campus in the early 1960s wearing this on my belt. We used to have fun seeing how fast we could draw them out of the case.
Boys will be boys. Everything is a challenge
There were scientific slide rules where a lower line was 1 and the upper line was times Pi just looking up on the hairline without moving the sliding middle. And commercial slides where the lower line was 1 and the upper one was times 360 ( daily interest) and mark up or down was easy. Yeah, and I know how to do slide rule stuff with logarithm tables ( lookup values adding and looking up the reverse value) with pen and paper. But I’d prefer my Casio scientific calculator or TI- spire CAS app if I had such problems at all. All I do is throwing SQL results at Pivot tables. The faber Castell SR had an additional magnifying lens as accessory that could be attached to the clear thingy for improved (lol) precision.
I did my A Level exams with a slide rule. Five years later I was using a Casio scientific calculator and writing stats analysis programs for THE computer at my college for my Diploma in Management Studies. I still love slide rules. They designed Vulcan, Blue Steel and Concord, and the ships my grandfathers sailed. I have my father's, with his main engineering formulae printed on its back. He literally did rocket science with those equations and that slide rule.
Does anybody know a place to buy a new slide rule?
Not new mostly but eBay is where I get mine
Thks, I've been search for this explpaination for quite a while. Hmmmmm of course log is a binary operation (ex: LOGbase result = exponent). However strangely, the exponent operand within the equation is typically called the log.
I have ---- wait a minute. Who the hell cares if I have an old slide rule or not!
We do
@@sliderulesandmathematics9232 Ok. Well actually I have a couple of the finest slide rules ever... somewhere in my stuff. See, my dad was a real (early) rocket scientist. I'm serious. He worked at White Sands and also at the ICBM missile base in the Marshall Islands, a good while ago.
fantastic!
@@sliderulesandmathematics9232 Hello again. I don't know if something odd is going on with youtube, but I no longer see my longer comment to which you replied "fantastic!".
I see it.
I found this site by chance and watched. I got motivated to drag out my Faber Casetll 2/83N and try out the exercises. While I didn't follow the process decribed in the video I got the right answers and using the 20" folded scales the precision was quite good. Brought back a lot memories when the slide rule was my only calculating tool in class.
There is no single process. There are many paths to the right answer and you have the best slide rule made
PRECISION!
True I will change it
IT I.S. 2 muCH for me, sir
Watch it a second time. It will come your way you.
STILL have mine and left high school in 1969. I thought it may come in handy some time, then they brought out scientific calculators. 🥴
in th 60's and 70's ,there was the hemmi slide rule made with bamboo and plastics. it was made in japan.with a leather case.
Can’t see a thing… 😮
As an engineering student, I was darn good at using my slide rule back in the 1960s. I knew all the scales. I still have it. Mine has a belt loop on the case. I could wear it walking around campus. Pretty nerdy huh? I also had a pocket protector, which was actually more than nerdy. Ink pens leaked a lot in those days.
Your 20" is most likely a half-metre
Yep
Nice presentation. Concerning time zones, it seems a bit clearer to understand on an azimuthal map.
Yes, you are right
I still have mine. Got me through Caltech in the late 60s. There were Pickett fans and K&E fans. Only the nerdiest hung them on their belts : ) I bought an identical one on Ebay for my granddaughter. I still have my little plastic circular slide rule from then, as well.
Cool. My only experience with a slide rule as a primary calculating device was the e6b flight computer
@sliderulesandmathematics9232 During my first year in grad school (1972), the (Astronomy) department bought a newly available HP-35 calculator for the (12 or slightly more) grad students to share. It was chained to a desk in our grad student lounge : )
And to think calculators are as valuable as paper clips now it seems. I think we all just use the free one on our phones
I prefer the tan/cream colored Pickett n3. Great scales and doubles as a katana
😂😂😂 my teacher from Aviation Academy back in 1983, in Riga. Always tried to maintain, that you can find the size of anything without knowledge of basics, excellent for fast figuring physics, mathematics, music.😂
Wow. Used slide rules in high school physics. Calculators when I got to college (1971).
I had a neighbor growing up, a retired electrical engineer. He tried to teach me how to use a slide rule and I learned the very basics. He was a brilliant guy and I wish I took more advantage of his tutelage. I remember that he usually used a 10" rule but for precise calculations he had a much larger one, at least 20", that he kept in a beautiful, custom made wooden case. When he took that down from the shelf, you knew he meant business. I stumbled across your channel today and it inspired me to buy one and see if I can re-learn after about a 45 year lapse. There is something special about the connectedness to the numbers that a slide rule affords and I'm looking forward to working my way through your videos. Cheers!
I absolutely agree
Wright Brothers first flight, Dec 17, 1903 > Chuck Yeager X-1, breaks sound barrier Oct 14, 1947 > less than 44 years, all with slide rule
I carried an aristo in college. I started college in 1959. Not sure when I bought the aristo.
Great slide rule
@@sliderulesandmathematics9232still have the aristo. One nice thing about the slide rule is that "all" of the answers are available, so you can visualize how thing vary in and around your answer. Calculators only give a number.
absolutely
Of the handful of rules that I have, the best one in terms of quality per price has been my Post Versalog. It has a great selection of scales, it's readable, and you can't beat the action on a bamboo rule. Plus they usually come with one of those old belt sheaths, so you can wear them in public to ensure you are never in danger of getting a single date. They're usually only 30 or so bucks.
I don’t have any but I’ll pick one up on your recommendation
Fountain pen, very classy!!!
Logarithmic scales!!!
Slide rule porno click bait and I fell for it? To find Bob the Science Guy I watch on your other debunking channels? I have my fav old school Pickett on display. I was a Math Lab asst in college in '70, '71' and taught slide rule to the general class.
I used a Pickett slide rule for years as a C-141 Flight Engineer. Then, they issued HP 41CV calculators which I used until I wrapped up my Air Force career.
That was very interesting, it's been years since we had slide-rule classes in Junior high. I've forgotten everything about them. I should probably revisit the skill again. Any suggestions for doing that?
Well I just put this series together. Only two more to go