"I feel like I should be in a case like this." Keith is a goddamn legend. In some ways, these videos are like Keith's case. They preserve his tale for generations to come.

How could one not feel a strong sense of inspiration and admiration when in the presence of such a device? Incredibly genius and beautiful. A priceless treasure to humanity on display to us. Thanks to Objectivity and the Royal Society.

You two guys together just keeps me glued to the screen. No matter what object you describe - you make it into an interesting and enjoyable experience. Thanks so much.

Brady and Keith are getting all the credit but here's one big thank-you to Kyle as well, who films and (probably/presumably) edits these videos in a consistent and steady way with zero added annoying viewer-retention ploys.

Keith with the purple gloves looking dapper af

Such a great channel! should be way more popular.

Keith wears some really nice suits.

Have his books ever been digitized? Reading handwriting can be quite a pain, and old books are so fragile, I worry that all his expertise might get lost one day. I really wish this info could be preserved somehow, the amount of thinking and hard work involved in coming up with this is insane!

a repeating circle was developed to improve the accuracy of LUNARS. A lunar is the distance between the moon and some other celestial object, typically the sun. This instrument improves the accuracy by averaging. You measure the distance several times as the telescopes walk around the circle. The intent was to remove the CENTERING ERROR by using all of the scale (not just the same part over and over). At the end, just find the average distance. Then, after some maths, you can determine your LONGITUDE anywhere on the earth, a method brought to fruition by Nevil Maskelyne, astronomer royal

Could not have expressed it better : Keith is 'revered and hard working'. Spot on!

It's not often you see ANY popular video with zero downvotes. Really is a good section of the internet.

Really like this channel. Both of you are doing such a great job presenting the collections, archives. And for a Swede like me, I am learning English as well, all ”kinds” of English. A nice contrast to all American English that most often reach us Swedes.

I would -never- leave the building! Food would have to be brought in to a room for me. 😆 I love every single time you share something Keith & Brady! 💝 Thank you Royal Society for preserving so much history.

The Repeating Circle is also my favorite Industrial Vaporcore band.

Hi! I love Objectivity! Brain Scoop directed me here and I’ve went back and watched all your videos from the beginning. Everything is extraordinarily fascinating! Thanks!

Would love to see what this would have looked like when brand new. Would be fascinating if a modern replica was made to see a side-by-side or even conduct a modern usability study at the locations it originally measured by present day RS members.

That’s a tease. In 1750 the Academy of Sciences Paris conducted the meridian surveys across France, Lapland, and in Ecuador, using repeating circles. I use 1950s era theodolites. Having read the popular accounts (book “The Measure of All Things”) I would like to see an expert properly demonstrate a repeating circle. Even if not this exact one. I’ve never seen a surviving repeating circle theodolite. This is just lead in to real video of the instrument.

The repeating circle circle.

You have the best videos, thanks for making them! Please don't disable comments they are fun to read.

This channel should be called 'Brady makes you jealous at the Royal Society.'

Wow. It's so precise and proper. It's like the opposite of a parker circle.

"An account of the method of dividing Astronomical and other Instruments by Ocular inspection; in which the usual tools for graduating are not employed; the whole operation being so contrived that, no error can occur but what is chargeable to vision when assisted by the best optical means of viewing and measuring minute quantities." -> 332 characters. Brady is correct. Too long for a tweet, even today. But while we're at it: "An Account of the Repeating Circle, and of the Altitude and Azimuth Instrument; describing their different Constructions, the Manner of performing their principal Adjustments, and how to make Observations with them; together with a Comparison of their respective Advantages." -> 274 characters. Perfectly tweetable.

As an Australian its interesting to hear your accent morph into a British 1 brady :P

Very interesting :-)

You can post 25 of those 280 character tweets at once. 7000 characters total, so he could fit it in a tweet thread.

2:54 That's not a title, that's an abstract.

Is there a project to digitize all the papers in the archive at all?

Ahh, first time being disappointed with a video. I wanted to know how it worked. Then at the end you tell me you're not going to say... thanks anyway for sparking my interest into finding out more about the tool.

Perhaps I am alone in finding the length of the titles of the papers presented in this edition both pleasing, instructive and precise in a way that leaves no question as to what is the exact subject at hand. I wish we were still as willing to take the time to properly describe the things we say, write and do rather than rushing to commit things in the quickest manner possible whilst still decrying such received opinions as, how one cannot discern tone in online writing, or, wondering why a particular combination of emoji has been mis-interpreted. I realise that having made such a statement: a) someone will almost inevitably say they didn't understand something of it, could I please be more precise, b) have rather played to a deliberate anti-TL;DR narrative with the manner of my arguments. In short, I could only aspire to write the sort of informative, detailed prose exhibited in those paper titles. Old-fashioned, anachronistic and dry, even, it may be, but I really do prefer it.

Very cool! This puts modern research article titles to shame.

Not enough scientific instruments these days are gold coloured.

I don't suppose the maker is an ancestor of Patrick Troughton, the second Doctor of Doctor Who..? en.wikipedia.org/wiki/Patrick_Troughton

I just wish that magazines were like that even today.

Brady!!! You missed a golden opportunity of giving an unnecessarily long and convoluted title for this video!

Uh oh! The abstract made it to the title?!

I feel slightly less bad about the longish title of my thesis.

A title to end all titles

And sooner or later.....a video on that most archaic device, the "Slide Rule". Seriously, high precision circular slide rules.

The maker of this thing look like Bill from The King of the Hill.

Even back then people probably didn't read the instructions before using new gear.

i dont want circles, only triangles! is it ovbious i'm also a vihart fan? oops

This was a French invention. They had and used it 100 years before the British!

When you have read the instructions and still don’t have a clue how to use it. That’s a real scientific instrument.

@clickspring

Why does Brady uses gloves while handling objects and removes them while handling papers??

As far as I knew, this was invented by Charles de Borda, did I know wrong?

Please inform Brady that India is NOT a continent..

First

0th comment and no one cares