@chrisstaecker.bsky.social
Mathematician, Z-list YouTuber.
I have made a reasonable facsimile of this sprite paper (US letter size). Please feel free to use.
08.11.2025 04:37 β π 139 π 53 π¬ 2 π 0I incorrectly said in my video that Lieberthal never mentioned any connection between the abacus and Chisanbop. Here he does draw a connection, and suggests that chisanbop was inspired by the abacus.
29.10.2025 10:03 β π 3 π 0 π¬ 0 π 0
Text describing the similarities of Chisanbop (Mathpattes) and the abacus. French text: En jouant du piano, vous pouvez enfoncer votre pouce, votre majeur e t votre auriculaire en mΓͺme temps afin de plaquer un accord. Cela est impossible avec MATHPATTES. Vos doigts doivent agir dans un ordre soigneusement préétabli. En d'autres mots, vous ne devez absolument pas improviser ou suivre vos impulsions. Cette rΓ¨gle rigoureuse s'applique Γ d'autres instruments comme le boulier ou abaque d'oΓΉ MATHPATTES pourrait provenir (ou inversement, MATHPATTES pourrait avoir prΓ©cΓ©dΓ© le boulier). Le boulier ancien fut probablement dessinΓ© d'aprΓ¨s la main. Remarquez la ressemblance entre les valeurs numΓ©riques reprΓ©sentΓ©es par chacun d'eux. Sous la conduite d'un cerveau prodigieux, les mains semblent Γͺtre Γ l'origine des premiers progrΓ¨s du calcul.
The same section from the english version. Text says: FINGER-PRESSING SEQUENCE There is one final rule to learn before you get into action with Finger-math. And this is one place where this method parts company with piano-playing and typewriting. The new rule has to do with the order in which the fingers must be pressed. Playing the piano, you might press your thumb, your middle finger, and your pinky simultaneously to sound a chord. That just can't happen with Fingermath. The basic principle, which makes it possible for you to build up numbers correctly and scientifically, requires you to use your fingers in a carefully developed sequence. They may be combined only according to that sequence. In other words, you mustn't make up your own tunes or improvise in any way. A similar rigid sequence is followed with other devices, such as the abacus, from which Fingermath was developed- or perhaps it was the other way around. I think it's reasonable to assume that the first tools ever used to calculate numbers were fingers, and that the abacus was modeled on the hand, which, under the guidance of a wondrous brain, may be credited with the earliest developments of computation. The ancient abacus probably was modeled after the hand. Note the similarity between the numerical values represented by each:
The text does not explain the origins of Chisanbop (Sung Jin and Hang Young Pai), but it does associate the method with the structure of the abacus. This description appears in Lieberthal's book as well.
29.10.2025 10:03 β π 3 π 0 π¬ 1 π 0
an illustration from "Mathpattes"
The art is all redone- I like it a lot better than the original. Thanks to Ed's friend for sending it to me!
29.10.2025 10:03 β π 3 π 0 π¬ 1 π 0
This may be my last Chisanbop book to archive. I just received in the mail a copy of "Mathpattes", presented as a french language version of Ed Lieberthal's "Complete book of Fingermath". Published in Switzerland, 1986 #chisanbop
archive.org/details/math...
Pascal's 1630 Machine, and the knockoffs! Pascaline Review www.youtube.com/watch?v=CROr...
27.10.2025 13:26 β π 1 π 1 π¬ 0 π 0A typical new video will lose me 3 or 4 subscribers in the first day or so, but eventually gains me subscribers as new viewers see it from recommendations.
The ones who watch immediately after I post are all subscribers already, so I can never gain subs from that audience- only lose a few.
a screenshot of youtube analytics showing an unsubscriber
Strange phenomenon: Every time I post a new video, I lose subscribers.
My interpretation: There are some subscribers who aren't really into me anymore. But they don't seek out my channel just to unsubscribe. They will only unsubscribe when they are reminded of me, which only happens when I post.
New video: I went to see the Pascaline! They did not let me touch it.
youtu.be/CROrLQpN6dc
@jaapsch.net has a video about it, although I'm not sure exactly how the "SEE calculator" is related to the "Pascal-Type Calculator". They are obviously the same thing, but the SEE says 1968 on it, and this says 1984. Did Burt Harrison buy the design? I don't know.
youtu.be/gwoIRgWmohE?...
excerpt from the instructions, telling you what sorts of stuff you can do with the machine. Ends with "think of other things".
"Think of other things"
23.10.2025 17:18 β π 3 π 0 π¬ 1 π 0
Just posted at @archive.org: instructions for the transparent "Pascal-type calculator" (also called the SEE calculator).
archive.org/details/pasc...
we call it "sneaky jeez"
22.10.2025 18:18 β π 2 π 0 π¬ 0 π 0I assume they will lend without expecting interest in return?
22.10.2025 15:50 β π 2 π 0 π¬ 0 π 0
My dad took me down to the #nokings
18.10.2025 14:35 β π 7 π 1 π¬ 0 π 0Ladies: if he says "heighth" he aint the one
15.10.2025 16:00 β π 4 π 0 π¬ 0 π 0least I can do to throw a guy a few hucks
14.10.2025 16:54 β π 1 π 0 π¬ 0 π 0
A screenshot of YouTubeβs new βhypeβ feature
I hyped it! (Didnβt know that was a thing, but it seemed appropriate!)
14.10.2025 16:28 β π 0 π 0 π¬ 1 π 0Love the 50 and 28s on the left columns
13.10.2025 18:53 β π 1 π 0 π¬ 0 π 0Now available! (but pretty boring tbh)
archive.org/details/stag...
Not a real Comptometer. How many errors can you spot?
On an auction site someone is claiming to have a Comptometer for sale, but the picture is some kind of AI-generated rubbish. I don't see the point, but it makes for a fun game: How many errors can you spot?
12.10.2025 22:53 β π 6 π 1 π¬ 3 π 0psh they wish
11.10.2025 20:53 β π 1 π 0 π¬ 0 π 0
Me with the pascaline calculator
The pascaline is in New York! No original stylus though π
11.10.2025 20:02 β π 14 π 0 π¬ 2 π 0it wasn't me
09.10.2025 14:39 β π 1 π 0 π¬ 1 π 0
Just in case:
The Rise and Fall of Chisanbop
youtu.be/Rsaf4ncxlyA
During all my research including years of eBay alerts for Chisanbop books, I never saw any indication that this book existed. But it looks like a full published version - not a proof copy or prerelease. So there must be others out there, but I never seen em!
Will scan and post to @archive.org soon!
The lost βStage 2β Chisanbop book by Pai and Lieberthal.
Just received in the mail the ultimate Chisanbop holy grail- the blue βStage 2β book by Pai and Lieberthal! I thought it was never published- I said in my video it was never written. But Randi found a copy at her momβs house! Thanks again Randi!
06.10.2025 18:59 β π 9 π 0 π¬ 1 π 1Yes- I will try to learn a bit when I make a video about this. My casual attempts in the past have been pretty poor.
06.10.2025 16:05 β π 1 π 0 π¬ 0 π 0
