I love how the boy is completely dry in all photos, including the one "in the water".

Congrats on the Doctor of Letters, Brady.

Oh wow, it's amazing the detail of the model mountain. It never occurred to me someone would produce a 3D topography back then, certainly not to that degree of accuracy.

for all who are interested: it's written Schiehallion experiment

Photoshopping long before Photoshop even existed!

The last time I was this early, the boy was still on the boat.

Was on Arthur's Seat today. 2spooky4me. (It's a volcanic batholith as far as I know)

To make the layers, you would take a sheet material (typically card or plywood now - not sure what would have been used then) and just cut out the appropriate contours into it (but in negative) so you'd end up with a mould roughly the size of the box the model is stored in with a "valley" the shape of the mountain. probably rub some kind of fat or soap onto the surface to prevent sticking, then just pour in the plaster

But of course Keith has climbed Arthur's Seat. I mean, obviously. I would not be surprised in the least if he flew around the world in a hot air balloon once. Seriously, Keith's backstory has to include some sort of adventurism (totally a word)

Who's here from Vox?

Keith is an outdoorsman and he's hard as nails.

Missing photo #4 is a retouched image of the boy and his buoy. It is titled, "The Boy and His Buoy."

Brady, Sixty Symbols the experiment involving the plumb line!!

Brady, could you do a video about Halley's Comet, when it was discovered by Halley in 1759 and its passes in 1835 and 1910? Maybe some drawings as well?

I don't have n° 4, but I know an actual time traveler, who could be convinced - by a small fee - to go back and take an actual picture of the boy after the shipwreck. Whould that help?

Excellent as always. Thank you.

Great video as always, I hope someone with the missing card see this and send it to the Royal Society.

Always fascinating.

Awesome!

Arthur Seat is indeed an extinct volcano. When you walk up there, you pass through parts from which you can only see nature, and you wouldn't guess to be in the middle of Scotland's capital!

Trading Cards! Collect them all!

Congratulations, Brady!

Beef Island sound like a good place to wash up after a shipwreck.

nice one, doc

I imagine they'll have made the model using layers of wood, then made a mould from that, then cast the plaster model :)

Love the video, hopefully #4 turns up :-)

That was awesome :)

I wonder how accurate the thickness of the plaster layers is to the height of the hill. It looks like it's probably exaggerated, but is it to any kind of scale?

can you do some vlogs on keith's everyday life. if you dont I might make a comic strip about it.

I was on Authur's Seat when I was 5!

I feel like I would get along well with Keith, I would love to have conversations at length with him!

Cant wait to see "Dr Brady" enter his videos now wearing a smoking jacket Monocular, and a pipe.

Nice Speedmaster ;-)

Last time, I was this early.

Have they found number 4 by now? Maybe?

Are there any Pokemon on top of that hill?

How did they calibrate the plumbbob?

Which room in the Royal Society are you both in? Looks pretty grand.

@Objectivity Was Henry James ever a member of The Royal Society?

Did you get the #4 in the end?

19th century photoshop; Amazing, it is.

No.4 is a selfie with his drowning shipmates in the background.

I'll trade you my No.4 for a No.2

Brady, what happened with your mouth at 2:02?

vox anyone ?

Come on Brady, you are an Aussie - it's pronounced lef-tenant not loo-tenant !