Slide Rule

Slide Rule

I haven't posted my love for #sliderules in a while. 1950s era K&E 4081 (5 in) Log-Log Duplex Decitrig. Immaculate condition. eBay find from way way back. As analog as you can get, I guess. Enjoy the eye candy 😍 #MathSky #EduSky

On this date in 1998, my friend George Sutton gave me his Keuffel & Esser Log Log Duplex Decitrig slide rule after I told him how I had earned one as a tip for shoveling snow in 1970.

OTD in 1998, my friend George Sutton gave me his Keuffel & Esser Log Log Duplex Decitrig slide rule after I told George and his wife Lois how I had earned one as a tip for shoveling snow in 1970. An excerpt from the Journal of the Oughtred Society article 👇 #sliderules #backintheday

They're accurate for two to three figures. The Aristo is a very nice rule. Great for figuring gas mileage, comparing prices. And the look on people's faces when you use them is priceless. More info: www.bobsoltys.net/sliderules #SlideRules

The rest of the slide rule collection, moved to the new apartment.

#sliderule #sliderules

A dresser with six drawers.

Slide rule collection has been moved to the new apartment! #sliderule #sliderules

K&E Slide Rule Front with Leather holster

K&E Slide Rule Back with Leather holster

Slide rule candy: K&E 4053-3 10 inch. No serial number, so probably manufactured around 1920. Wood is mahogany. Not in original case but props to the era where you wore these on your belt! Also appreciate the unit conversions on back. What are Chains to Metres? #SlideRules #MathSky #Physics

Front view of a wee circular slide rule.

#sliderules

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What I found at the back of a drawer last night. Here it's lined up (more or less) to multiply by 2.

The Genius Of Slide Rule Precision Most people have heard of or seen slide rules, with older generations likely having used these devices in school and at their jobs. As purely analog computers these ingenious devices use precompute…

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.

He won every time.

#SlideRules #calculators

The Genius of Slide Rule Precision
hackaday.com/2024/05/29/t...

After a tasty lunch break, #Junto24 resumes w/a special presentation by Kate Sheppard (Missouri S&T), which has already won me over w/its pun-derful title.

Get ready, everybody…we’re talking about slide rules!

#histsci #histSTM #MathHistory #SlideRules #badpun

Walter Shawlee, the Sovereign of Slide Rules, Is Dead at 73 Used by engineers for centuries, they were displaced by pocket calculators and all but forgotten until Mr. Shawlee created a subculture of obsessives and cornered the market.

“When we used slide rules every day back in the 1960s, we were able to send people to the moon,” Mr. Shawlee told The Journal. Speaking to The Times, he observed, “People who grow up with calculators have no number sense.”

www.nytimes.com/2024/02/08/s...

#histSTM #sliderules #Math🗃️🛝📏