I remember reading about that clock in a book when I was a child. It was really fascinating to read about all the steps needed to get to the latest iteration of the peoject
I heard about Dava Sorbel's book "Longitude" on public radio in 1995 and bought it. It is a very interesting book detailing all the trials & tribulations that John Harrison endured. What isn't mentioned in the lecture (I don't think) is in attempting to determine longitude in the 1700's men of science accurately determined the speed of light. This was accomplished by watching for moons that orbit other planets disappearing behind their planets and reappearing then calculating when they should clear the planet and the time needed to actually be seen on earth (the difference being the speed of light). Amazingly they had already calculated the distance to the planets. All this in the 1700's. It is all very fascinating and I would encourage everyone to read the book "Longitude". I just reread it this past week on vacation which prompted me to look for videos about the clocks on UA-cam.
The miniseries with Jeremy Irons is also very good and is on youtube. The speed of light was determined in the 1680s by Ole Römer. He and several others were watching the moons of Jupiter as a clock to determine the longitude between the Paris observatory and Tycho Brahe's observatory on Hven in Denmark. He found a difference of about 15 minutes depending on where in it's orbit the Earth was and realized that the speed of light was not infinite but rather that the diameter of Earth's orbit was about 15 light-minutes. As far as I know he didn't publish it himself but others (Christian Huygens?) of the time give him the credit.
I actually just finished that book today and wanted to see if I could find a replica.. would be nice. The accuracy is crazy since modern rolex's are worst in accuracy compared to this
Captain Cook took 2 clocks on board, by Arnold and Kendal. Here is the poem by Kenneth Slessor about it: Two chronometers the captain had, One by Arnold that ran like mad, One by Kendal in a walnut case, Poor devoted creature with a hangdog face. Arnold always hurried with a crazed click-click Dancing over Greenwich like a lunatic, Kendal panted faithfully his watch-dog beat, Climbing out of Yesterday with sticky little feet. Arnold choked with appetite to wolf up time, Madly round the numerals his hands would climb, His cogs rushed over and his wheels ran miles, Dragging Captain Cook to the Sandwich Isles. But Kendal dawdled in the tombstoned past, With a sentimental prejudice to going fast, And he thought very often of a haberdasher’s door And a yellow-haired boy who would knock no more. All through the night-time, clock talked to clock, In the captain’s cabin, tock-tock-tock, One ticked fast and one ticked slow, And Time went over them a hundred years ago.
If I ever visit London those clocks are definitely on my list of things to see.
I remember reading about that clock in a book when I was a child. It was really fascinating to read about all the steps needed to get to the latest iteration of the peoject
I heard about Dava Sorbel's book "Longitude" on public radio in 1995 and bought it. It is a very interesting book detailing all the trials & tribulations that John Harrison endured. What isn't mentioned in the lecture (I don't think) is in attempting to determine longitude in the 1700's men of science accurately determined the speed of light. This was accomplished by watching for moons that orbit other planets disappearing behind their planets and reappearing then calculating when they should clear the planet and the time needed to actually be seen on earth (the difference being the speed of light). Amazingly they had already calculated the distance to the planets. All this in the 1700's. It is all very fascinating and I would encourage everyone to read the book "Longitude". I just reread it this past week on vacation which prompted me to look for videos about the clocks on UA-cam.
The miniseries with Jeremy Irons is also very good and is on youtube.
The speed of light was determined in the 1680s by Ole Römer. He and several others were watching the moons of Jupiter as a clock to determine the longitude between the Paris observatory and Tycho Brahe's observatory on Hven in Denmark. He found a difference of about 15 minutes depending on where in it's orbit the Earth was and realized that the speed of light was not infinite but rather that the diameter of Earth's orbit was about 15 light-minutes. As far as I know he didn't publish it himself but others (Christian Huygens?) of the time give him the credit.
I actually just finished that book today and wanted to see if I could find a replica.. would be nice. The accuracy is crazy since modern rolex's are worst in accuracy compared to this
Captain Cook took 2 clocks on board, by Arnold and Kendal. Here is the poem by Kenneth Slessor about it:
Two chronometers the captain had,
One by Arnold that ran like mad,
One by Kendal in a walnut case,
Poor devoted creature with a hangdog face.
Arnold always hurried with a crazed click-click
Dancing over Greenwich like a lunatic,
Kendal panted faithfully his watch-dog beat,
Climbing out of Yesterday with sticky little feet.
Arnold choked with appetite to wolf up time,
Madly round the numerals his hands would climb,
His cogs rushed over and his wheels ran miles,
Dragging Captain Cook to the Sandwich Isles.
But Kendal dawdled in the tombstoned past,
With a sentimental prejudice to going fast,
And he thought very often of a haberdasher’s door
And a yellow-haired boy who would knock no more.
All through the night-time, clock talked to clock,
In the captain’s cabin, tock-tock-tock,
One ticked fast and one ticked slow,
And Time went over them a hundred years ago.
Why not first submit the watch for a high resolution CT scan?
En el muelle real deje todo dijo mi familia