It is fascinating to see the progression of "mechanical" computation by way of the measurement of distances and dimensions of physical objects. Another thing I did not know was a thing, thanks!
Hey awesome video man! Thanks for taking the time to share! It's hard to find much modern info on sectors. I have been working on reading the sector book for a while. There's a couple good videos out on guys using modern sectors for furniture making operations.
Gunter's 3-part sector book is only about 150 pages (it's bound together with some further volumes about other instruments), and there are some nice scans available from the Internet Archive. It isn't too terrible to follow compared to many of the other math books of the day, written in Latin! The sector in the form you have here is the 18th-19th century English version. Gunter's early ~1620 version didn't have the logarithmic scales on it, or some of the other scales. I'm not quite sure what the timeline was of the various extensions. Later editions of Gunter's works included some material about additional scales by Samuel Foster. To learn about the standard 18th century version you can look at e.g. Stone's expanded translation of Bion's treatise on mathematical instruments, which has a long section about the English sector.
On the first ruler you pulled out it looks like a diagonal scale on the bottom of the back. And I think the other mystery scale may be a scale of chords.
Oh no.. now you started me on a hunt for a a Post 1460 "Versalog II" -- the scales on yours are different than both of my Versalog slide rules. I thought I had more than enough of this model, but now there's THIS one too...
Is it a Wartenberg wheel? Heh. I think it's actually called a trace or pounce wheel. This was a great video. For whatever coincidental reason, slide rules and these related time have been on my mind lately. Your explanations were really enlightening.
Analog rules ! 💪🏻. Beautiful stuff. Thanks for going over it.
It is fascinating to see the progression of "mechanical" computation by way of the measurement of distances and dimensions of physical objects. Another thing I did not know was a thing, thanks!
Hey awesome video man! Thanks for taking the time to share! It's hard to find much modern info on sectors. I have been working on reading the sector book for a while. There's a couple good videos out on guys using modern sectors for furniture making operations.
Gunter's 3-part sector book is only about 150 pages (it's bound together with some further volumes about other instruments), and there are some nice scans available from the Internet Archive. It isn't too terrible to follow compared to many of the other math books of the day, written in Latin! The sector in the form you have here is the 18th-19th century English version. Gunter's early ~1620 version didn't have the logarithmic scales on it, or some of the other scales. I'm not quite sure what the timeline was of the various extensions. Later editions of Gunter's works included some material about additional scales by Samuel Foster. To learn about the standard 18th century version you can look at e.g. Stone's expanded translation of Bion's treatise on mathematical instruments, which has a long section about the English sector.
the wheel thing is to measure distances on the curve (quite boring but can be done) and make circular dotted lines.
Very cool, thanks for sharing this.
On the first ruler you pulled out it looks like a diagonal scale on the bottom of the back. And I think the other mystery scale may be a scale of chords.
Oh no.. now you started me on a hunt for a a Post 1460 "Versalog II" -- the scales on yours are different than both of my Versalog slide rules. I thought I had more than enough of this model, but now there's THIS one too...
can't have too many slide rules 😎
ua-cam.com/video/oMSptZCOOa4/v-deo.htmlsi=ijbTZARCdnm3uz2A
@@IMSAIGuy funny, I recently told my wife the exact same thing!
Edmond Gunter. His first name was Edmond
I have read that book
It is a hard book to read
Yes very hard. Even the spellings are different from our day. I mostly understood that book from diagrams.
9:25 - Decimal feet?
Is it a Wartenberg wheel? Heh. I think it's actually called a trace or pounce wheel.
This was a great video. For whatever coincidental reason, slide rules and these related time have been on my mind lately. Your explanations were really enlightening.
Pounce! that is what I recall...
Almost made me want to drag out my Pickett rule and hook the leather carrier onto my belt...ugghh, what a mental pix of university days that is! TNX!