amen zwa, esq.<p><a href="https://mathstodon.xyz/tags/Accounting" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Accounting</span></a>, <a href="https://mathstodon.xyz/tags/SlideRules" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SlideRules</span></a>, <a href="https://mathstodon.xyz/tags/penmanship" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>penmanship</span></a>, <a href="https://mathstodon.xyz/tags/shorthand" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>shorthand</span></a>, <a href="https://mathstodon.xyz/tags/typing" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>typing</span></a>, <a href="https://mathstodon.xyz/tags/telegraphy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>telegraphy</span></a>, and <a href="https://mathstodon.xyz/tags/carpentry" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>carpentry</span></a> were taught to school children in Burma, well into the 1980s. I think it would be socially beneficial to teach these skills to young American kids, today.</p><p>Basic accounting and personal finance are useful skills for adults, and indispensable for college kids wielding credit cards.</p><p>The slide rule endows the student with a keener understanding of various functions and, more importantly, always to check one's results, mentally. </p><p>Being able to write in a beautiful, cursive script with a fountain pen may now be but a party trick, but it still is an important social skill.</p><p>Shorthand offers a massive advantage in note taking. Given that every child learns to type social media posts well before they first learn to speak, proper typing technique should be taught to children, for efficiency, for preventing repetitive stress injuries, etc.</p><p>Telegraphy is valuable in aviation: VOR and NDB navigation aids transmit their identifiers in Morse code. And Morse code is still a thing in the amateur radio scene.</p><p>Teaching kids basic carpentry, like making a rough table, is of limited utility, but they will never forget that experience of making something out of raw materials.</p><p>Above all, these old skills are cool, at least in some circles. And if nothing else, these activities will surely keep them off social media.</p>
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#sliderules
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Rob\Viewdata UK<p>There was somebody on her who restored <a href="https://irrelevant.me.uk/tags/sliderules" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>sliderules</span></a> but I can't remember who. Five here, one very broken, but the others look to be in pretty good nick.</p>
amen zwa, esq.<p>Neil deGrasse Tyson on <a href="https://mathstodon.xyz/tags/SlideRules" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SlideRules</span></a>—the interviewer has never heard of the slide rule.</p><p>I'm proud to say that mine was the last batch of students who used the slide rule in our <a href="https://mathstodon.xyz/tags/engineering" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>engineering</span></a> school in Burma, way back in the early 1980s.</p><p>I used the government-issued Aristo 0968 log-log duplex engineering straight rule and the hand-me-down Faber-Castell 8/10 circular rule. But my all-time favourite has always been the Hemmi 130W advanced Darmstadt—simple, elegant, compact, powerful.</p><p><a href="https://youtube.com/shorts/uy99Jnnfi88?si=65DhbMXMIdB-SBU9" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">youtube.com/shorts/uy99Jnnfi88</span><span class="invisible">?si=65DhbMXMIdB-SBU9</span></a></p><p><a href="https://amenzwa.github.io/stem/ComputingHistory/HowSlideRulesWork/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">amenzwa.github.io/stem/Computi</span><span class="invisible">ngHistory/HowSlideRulesWork/</span></a></p>
Inaction Figure<p>Who is still making Slide Rules? </p><p>The usual answer to this question is Concise in Japan.</p><p>I give you... The Alvin No 7355 Screw Data Selector slide chart with C and D scales!</p><p><a href="https://fosstodon.org/tags/SlideRules" class="mention hashtag" rel="tag">#<span>SlideRules</span></a> <a href="https://fosstodon.org/tags/SlideRule" class="mention hashtag" rel="tag">#<span>SlideRule</span></a></p>
Inaction Figure<p>Here are a Pickett 1000, 500, and 800-T. The 500 and 800-T are good examples of how Pickett <a href="https://fosstodon.org/tags/SlideRules" class="mention hashtag" rel="tag">#<span>SlideRules</span></a> changed over time, changing from magnesium to aluminum, adding scales, updating the cursor, and arranging their scales differently. Pickett, K&E, Post, and other <a href="https://fosstodon.org/tags/SlideRule" class="mention hashtag" rel="tag">#<span>SlideRule</span></a> manufacturers switched from the LL0 & LL00 scales keyed to A & B to the reciprocal Log-Log scales keyed to C & D in the mid-1950s.</p>
Inaction Figure<p><span class="h-card" translate="no"><a href="https://mastodon.sdf.org/@mbbrutman" class="u-url mention">@<span>mbbrutman</span></a></span> </p><p>Thank you! <a href="https://fosstodon.org/tags/SlideRules" class="mention hashtag" rel="tag">#<span>SlideRules</span></a></p>
Inaction Figure<p><span class="h-card" translate="no"><a href="https://mastodon.radio/@M0CUV" class="u-url mention">@<span>M0CUV</span></a></span> <span class="h-card" translate="no"><a href="https://mastodon.radio/@g7vkq" class="u-url mention">@<span>g7vkq</span></a></span> <span class="h-card" translate="no"><a href="https://mastodon.radio/@g7kse" class="u-url mention">@<span>g7kse</span></a></span> </p><p>It’s an easy rabbit hole to fall down. If you have a couple <a href="https://fosstodon.org/tags/SlideRules" class="mention hashtag" rel="tag">#<span>SlideRules</span></a> you like, stay away from EBay!</p><p>I’d try making sure they are good and clean before trying to add anything to lubricate them.</p>
Jon Bosak<p><a href="https://flx.masto.host/tags/sliderules" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>sliderules</span></a></p><p>1/</p><p>What I found at the back of a drawer last night. Here it's lined up (more or less) to multiply by 2.</p>
Inaction Figure<p><span class="h-card" translate="no"><a href="https://mastodon.radio/@N1ZZZ" class="u-url mention">@<span>N1ZZZ</span></a></span> <span class="h-card" translate="no"><a href="https://mastodon.radio/@DD8SF" class="u-url mention">@<span>DD8SF</span></a></span> </p><p>Been there, done that. It’s a real easy mistake to make. Some other Slide Rule manuals spend a lot of pages on “How to Read the Scales” exercises. Practice makes Perfect!</p><p><a href="https://fosstodon.org/tags/SlideRule" class="mention hashtag" rel="tag">#<span>SlideRule</span></a> <a href="https://fosstodon.org/tags/SlideRules" class="mention hashtag" rel="tag">#<span>SlideRules</span></a></p>
Inaction Figure<p><span class="h-card" translate="no"><a href="https://mastodon.social/@ridetheory" class="u-url mention">@<span>ridetheory</span></a></span> </p><p>No questions, just applause. </p><p>My <a href="https://fosstodon.org/tags/EDC" class="mention hashtag" rel="tag">#<span>EDC</span></a> is a Pickett N200-T.</p><p><a href="https://fosstodon.org/tags/SlideRule" class="mention hashtag" rel="tag">#<span>SlideRule</span></a> <a href="https://fosstodon.org/tags/SlideRules" class="mention hashtag" rel="tag">#<span>SlideRules</span></a></p>
Inaction Figure<p><span class="h-card" translate="no"><a href="https://social.jlamothe.net/profile/me" class="u-url mention">@<span>me</span></a></span> </p><p>Yup! A circular slide rule is a little unconventional, but has the advantage of never “going off scale”, where your answer is of the end of the rule. For example, when multiplying 4 by 6.</p><p>If you want a conventional, linear, <a href="https://fosstodon.org/tags/SlideRule" class="mention hashtag" rel="tag">#<span>SlideRule</span></a>, I don’t think anyone is still making them. You’ll have to look at eBay or ISRM. There are plenty of nice, affordable used <a href="https://fosstodon.org/tags/SlideRules" class="mention hashtag" rel="tag">#<span>SlideRules</span></a> to be found!</p>
Inaction Figure<p><span class="h-card" translate="no"><a href="https://social.jlamothe.net/profile/me" class="u-url mention">@<span>me</span></a></span> </p><p>Look for “Concise” on Amazon. They are a Japanese company that appears to be the last company manufacturing <a href="https://fosstodon.org/tags/SlideRules" class="mention hashtag" rel="tag">#<span>SlideRules</span></a>. </p><p>You can also check <a href="http://sliderulemuseum.com/SRM_Duplicates.shtml" target="_blank" rel="nofollow noopener" translate="no"><span class="invisible">http://</span><span class="ellipsis">sliderulemuseum.com/SRM_Duplic</span><span class="invisible">ates.shtml</span></a> to “adopt” an extra <a href="https://fosstodon.org/tags/SlideRule" class="mention hashtag" rel="tag">#<span>SlideRule</span></a> from their collection.</p><p>Also, it’s pretty easy to find an affordable <a href="https://fosstodon.org/tags/SlideRule" class="mention hashtag" rel="tag">#<span>SlideRule</span></a> on EBay.</p><p>Welcome to the hobby!</p>
cthululemon<p>I love Slide Rules (and other ways I’ve alienated friends). </p><p><a href="https://social.cthululemon.com/tags/subtoot" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>subtoot</span></a> <a href="https://social.cthululemon.com/tags/SlideRules" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SlideRules</span></a></p>
Doctor Disco 🏴🏳️🌈<p>Redoing my intro toot as garbage collection (old post auto deletion) cleared out my original. </p><p>My name's Pete. I'm a 54 yr old software developer and erstwhile mathematician. I'm a late diagnosed <a href="https://mendeddrum.org/tags/Autistic" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Autistic</span></a> male. Cishet but probably somewhere on the <a href="https://mendeddrum.org/tags/ace" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ace</span></a> spectrum. </p><p>I am interested in <a href="https://mendeddrum.org/tags/HomeAutomation" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>HomeAutomation</span></a> via <a href="https://mendeddrum.org/tags/HomeAssistant" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>HomeAssistant</span></a> on <a href="https://mendeddrum.org/tags/RaspberryPi" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>RaspberryPi</span></a> .</p><p>I collect <a href="https://mendeddrum.org/tags/SlideRules" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SlideRules</span></a> , <a href="https://mendeddrum.org/tags/Fossils" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Fossils</span></a>, <a href="https://mendeddrum.org/tags/Minerals" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Minerals</span></a>, <a href="https://mendeddrum.org/tags/DVDs" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>DVDs</span></a>, <a href="https://mendeddrum.org/tags/RubiksCubes" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>RubiksCubes</span></a> and <a href="https://mendeddrum.org/tags/Cravats" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Cravats</span></a> .. if you can see a connection there you're a better person than me ;)</p>
Inaction Figure<p>Is there some sort of convention for naming hashtags? Should they always be plural? Or singular? I see and use both <a href="https://fosstodon.org/tags/SlideRule" class="mention hashtag" rel="tag">#<span>SlideRule</span></a> and <a href="https://fosstodon.org/tags/SlideRules" class="mention hashtag" rel="tag">#<span>SlideRules</span></a>, <a href="https://fosstodon.org/tags/Motorcycle" class="mention hashtag" rel="tag">#<span>Motorcycle</span></a> and <a href="https://fosstodon.org/tags/Motorcycles" class="mention hashtag" rel="tag">#<span>Motorcycles</span></a>.</p>
Inaction Figure<p>Slide rules are fun, but I really like pocket rules. I recently added a Dietzgen 1776 and an UTO 601 Reitz. Most of my rules are Picketts, so these are a nice addition to the collection.</p><p>So, for fun, here are ten of my fourteen pocket rules. No more would fit!</p><p>- Aristo 867U, KL-1, Aristo 868<br />- Pickett 600, 1006, 100 "Douglas Sky Rule"<br />- Dietzgen 1776, UTO 601 Reitz<br />- Pickett 700, 200</p><p>Not pictured are Pickett N200T, 300, 400, N700T, nor my full-size and circular rules.</p><p><a href="https://fosstodon.org/tags/SlideRules" class="mention hashtag" rel="tag">#<span>SlideRules</span></a> <a href="https://fosstodon.org/tags/SlideRule" class="mention hashtag" rel="tag">#<span>SlideRule</span></a></p>
Inaction Figure<p><span class="h-card" translate="no"><a href="https://oldbytes.space/@drscriptt" class="u-url mention">@<span>drscriptt</span></a></span> </p><p>Slide rules help with understanding math more than digital calculators do.</p><p>If you do get out your slide rules and join the fun, post a picture!</p><p>I'm pretty sure you can get a new Concise 300 or 28 on Amazon!</p><p><a href="https://fosstodon.org/tags/SlideRule" class="mention hashtag" rel="tag">#<span>SlideRule</span></a> <a href="https://fosstodon.org/tags/SlideRules" class="mention hashtag" rel="tag">#<span>SlideRules</span></a></p>
Marc MimsMike Syphers did an excellent write up on my dad's invention, the Aver-O-Matic <a class="hashtag" href="https://ack.nerdfight.online/tag/sliderule" rel="nofollow noopener" target="_blank">#Sliderule</a>. <br><br><a href="https://followingtherules.info/the-aver-o-matic.html#the-aver-o-matic" rel="nofollow noopener" target="_blank">https://followingtherules.info/the-aver-o-matic.html#the-aver-o-matic</a><br><br>If you're not interested in the technical description, skip down to the biographical sketch. Dad was an incredibly interesting person and Mike did a great job summarizing who he was. <br><br>Mike has a huge collection of <a class="hashtag" href="https://ack.nerdfight.online/tag/sliderules" rel="nofollow noopener" target="_blank">#SlideRules</a> meticulously documented on his site. I'm thrilled to see Dad's work represented there.
cthululemon<p>One of my favorite slide rules is the Charpentier Calculimètre. Something about circular slide rules makes understanding mantissa rollover easier, which helps a lot when I try to teach people. </p><p>This example dates from the 1910s, I believe. </p><p>Anyway, in this image I have the index at 3.14 which, you can see, approximately equals 22/7. </p><p><a href="https://social.cthululemon.com/tags/SlideRules" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SlideRules</span></a></p>
Anson<p>I had a chemistry professor in college who would challenge students that he could solve problems with his side rule faster than they could with their newfangled calculators. </p><p>He won every time.</p><p><a href="https://mastodon.social/tags/SlideRules" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SlideRules</span></a> <a href="https://mastodon.social/tags/calculators" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>calculators</span></a> </p><p>The Genius of Slide Rule Precision<br><a href="https://hackaday.com/2024/05/29/the-genius-of-slide-rule-precision/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">hackaday.com/2024/05/29/the-ge</span><span class="invisible">nius-of-slide-rule-precision/</span></a></p>
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