Time In A Bottle

Imagine that you are lost. Can you imagine that? Probably not, right? Not any more. Pull out the iPhone and you know exactly where you are, presuming Google Maps or your app of choice isn't confusing your location with somewhere else or someone else and there's enough signal. Like that last part is much of an issue any more. 

But it wasn't always that way, right? We do remember those days, don't we? Some of us? Maybe? Not before reliable signal. I mean before phones with us everywhere we go.

So it used to be different. What's the big deal about being lost anyway? I mean so you go down the wrong street and have to turn around and walk or drive back again. What's the problem? Who really needs a nav app? And people used to get around fine with paper maps. I can't quite believe it but I used to drive all over the United States with no cellphone and a road atlas or a series of printed or written directions or both. Hey...it worked. I got everywhere I needed to get and I was rarely, if ever, late. No. Big. Deal.

Now imagine it's the early 1700s and you are on a boat. I don't mean like a rowboat within sight of shore somewhere. I mean like a ship on the open ocean. Do you have any idea where you are on the face of the planet? There's no GPS back then and there's nothing to see but just water, water, everywhere. How the heck do you know where on the ocean you are?

There is insufficient time (and personal understanding of the subject) for me to go into exhaustive detail on this blog about the history of mankind's ability to navigate on open water. But suffice it to say that various methods of moving on and over our planet's large expanses of water have been used over time. Star charts. Ocean charts. The compass (after like the 11th or 12th century). Bird movements (not kidding). And the sun. But the sun and the stars had some limitations. The stars could only help at night (and a cloudless night at that) and the sun could really only help with a latitude determination (meaning where you are up or down the planet) based on the known date. True position determination needs more than just latitude.

You need both latitude and longitude.

Standing either side of the Prime Meridian (0 degrees longitude), Greenwich.

Longitude (meaning where you are relative to the prime meridian or right to left on the planet) was way tougher to determine. And honestly, if you know where you are up-down but not right-left, it's not really that useful in determining exactly where on the open ocean you are. So sure, I'd rather have some clue where I am north-south on the globe but disaster can strike if you don't know where you are in the other direction. And it did. Frequently. Wrecking ships and killing sailors. 

So why is figuring out longitude tougher? Well...it's not. It really is pretty easy and can be done if you know what time it is. We have that on our phones, right? Oh wait a second...

Let's go back to that early 1700s on a boat scenario shall we? At that time in history there were two options for timepieces: clock or pocket watch. Clocks at that time in our history had pendulums and didn't work so well when on the ocean. The waves kind of messed up the pendulum's action. Not an option. And pocket watches? Terribly inaccurate. There's an unverified comment on the pocket watch Wikipedia page (always a dangerous source of information, I know...) that states that pocket watches in the 1700s were fast to the tune of an hour a day. Know how long an ocean trip took back then? More than a few days. And if your watch is an hour fast and you try to plot your position, you could be a time zone off. That's pretty big.

The Octagon Room inside the Flamsteed House, Greenwich.

So, around the turn of the 18th century, some countries decided to try to do something about the issue of figuring out longitude while ocean-bound. In 1714, Britain issued a challenge for anyone to take up: find a way to solve the issue of determining longitude while at sea and there's a reward. It was called the Longitude Act. And some people took that challenge pretty seriously. Hey...there was government cash involved. Like £20,000. That's like about £4 million in today's money.

One of those people was a carpenter and clockmaker from the West Riding of Yorkshire named John Harrison. In 1714, he was 19 years old. And he thought if he could make a clock that worked on a ship, that prize might just be his.

To be clear, here, there were potentially other solutions to the longitude problem, but not necessarily to a clockmaker.

14 years later, John Harrison was hard at work designing and manufacturing a marine clock using two interconnected balances joined by a spring that would substitute for the traditional pendulum on most clocks of the day. It was based on a design that he had used in building incredibly accurate wooden clocks in the past, although wood clearly wouldn't work on board a ship due to expansion concerns. To me, this clock looks like it has two pendulums with large balls on the top which oscillate towards and away from each other (there's a picture below). 

Harrison's first marine clock (now called H1) was the first device or idea of any sort tested to see if it might meet the requirements of the Longitude Act. It was taken for a test drive on a journey to Portugal in 1736, about eight years after Harrison had started working on it but just five years after he actually started building it. Eight years. Designing and building a clock. I assume he had other work to do during this period but you know...

Harrison's clock worked and it didn't work on the voyage there and back to Lisbon. It lost time on the way there but was used to correctly pinpoint the longitude of the ship on the return trip when the ship's Master's opinion was that the ship was in a different location. Pretty good, right? But not good enough for either Harrison or the Board of Longitude. Another clock would be required. Although it was promising enough that Harrison was paid £500 by the Board to start work on H2.

Nice try. Thanks for the last eight years. Keep going but start over.

H1. Completed 1735. Tested 1736.

If you want to see the H1 clock today that Harrison built 190 years ago or so, you can. It's in the Flamsteed house, the Christoper Wren-designed part of the Royal Observatory that's at the top of the hill in Greenwich, England, just a bit down the Thames to the east of London. H1 sits smack in the middle of an entire exhibit devoted to the Longitude Act. The stories of the ships that were wrecked on hidden reefs or rocks all because they didn't know or couldn't tell exactly where in the ocean or sea or channel or whatever they were floating on are astonishing. It's no wonder that this was such a high priority for more than one European nation to issue a call for solutions.

There is also a really pretty informative interactive display showing why a pendulum clock won't work on a boat that is listing to one side. When the boat is tilted in the exhibit, the clock's pendulum keeps swinging, but the center of the clock where the action of the pendulum advances the time doesn't ever get passed by the pendulum, so it doesn't keep time. 

Harrison's second effort (H2) is in the Royal Observatory as well. And spoiler alert: so is every other clock that Harrison submitted in consideration of the Longitude Act prize. H2 took Harrison just three years to build and it actually seemed like it would work well enough to claim victory over the whole longitude issue. It was tested by Harrison on land enough that he felt pretty confident about this device having a shot at winning the cash money. But he eventually figured out that the device might not survive the tilt of a boat tacking and he couldn't very well tell captains of ships not to tack. I guess he knew what he had done wrong because he suddenly ceased work on the H2 clock version and started on the third iteration of his ideas (H3) in the year 1740. Another three years gone. So we are up to now what...11 years? All in pursuit of a clock that works on a ship?

To me, H2 looks less like a traditional clock than H1. Not a whole lot, but it's definitely less timepiece-like. Maybe that's part of the point of what was going on in Harrison's head. Maybe the answer here would be something that didn't look like a traditional clock. I am pretty confident here that I will never, ever be able to understand how these or any other clocks work, so I'm sure I'm stabbing in the dark here and making the leap that less clock-like means closer to the solution. Maybe it's the architect in me that's speaking here. 

All of these clocks in the Royal Observatory by the way: spectacular condition. I mean these things look better than any object I own in my entire house. And they are almost 200 years old. I realize there are probably people out there paid a lot of money to maintain these things but still...spectacular!!!

H2. Completed 1740. Never tested at sea.

If H1 and H2 represented a pretty good effort at the Longitude Act prize, H3 was, simply put, an incredible science project for sure. Eight years on H1 and three on H2? Child's play. H3? 19 years. 1740 to 1759. 19 years on one clock. Apparently, it was a masterpiece. It moved clock technology forward through the introduction of a bimetal strip for temperature compensation and a special roller bearing that would reduce friction. The design of the clock got Harrison the Copley Medal, the highest award conferred by the Royal Society. By all accounts, it was an act of supreme clock-making genius and craftsmanship, well worth the 19 years that Harrison labored over the thing. 

But it didn't win him the Longitude Act money. It wasn't accurate enough. He knew it as soon as it was done. They didn't even test it on a ship. Skipped the whole thing.

Can you imagine working on something for almost two decades to get to a specific goal only to abandon it because what you had invented and built wasn't good enough? Harrison turned 66 in 1759. He'd been working on this problem for over 30 years and he still hadn't solved it, including after spending 19 whole years on his third try.

H3 sits in the same room in the Flamsteed House as H1 and H2. Like both of its predecessors, it is in immaculate condition. It's just gorgeous. But it does not look like a clock. Not really. Not the way I think of a clock with a 1-12 dial with an hour, minute and maybe a second hand on it. I realize that H1, H2 and H3 all look primarily like really well put together bronze boxes but with each iteration, I feel they are getting further and further away from being clock-like. It's pretty obvious (with the benefit of 200 plus years of history) that something interesting is going on here.

So...30 plus years in working on a problem and he still doesn't have it licked. Thinking about quitting? Not our guy John Harrison. He kept going.

If you are feeling bad for Harrison at this point, by the way, I guess that's understandable. But he was receiving some payment from the Longitude Board for his efforts. Thought the completion of H3, Harrison had taken home £3,000 in payment for his efforts. I know it's not 30 years worth of effort but it's not nothing. Still...three clocks and only one sea test? That is kind of brutal.

H3. Completed 1759. Never tested at sea.

So what happens after you work for 30 years on a single problem without solving the issue? Well, in John Harrison's case, he just went ahead and solved it. He did it with H4. And H4 looks nothing like H1 through H3. Nothing. 

While he'd been working away on his sea clocks, John Harrison had continued to make clocks un-related to the Longitude Act. In the early 1750s, he had commissioned a watch maker to assemble a pocket watch for him that would continue to run while being wound but also would work consistently under different temperature conditions. And apparently, these innovations for this watch inspired Harrison to make something completely unlike his previous sea clocks and decidedly more pocket-watch-y. Although it's a pretty darned large pocket watch and is really nothing like a pocket watch at all.

I've claimed extreme ignorance of the inner workings of timepieces once in this post and here I'm going to do it again. I have no ability to explain how H4 works other than reading what's on the Royal Observatory's website and writing that H4 in pretty much all ways resembled a full size clock more than a something you would carry in your waistcoat pocket and the fact that it ticked five times a second allowed it to be more accurate and more resilient than any other portable watch created to date in human history.

The enclosed mechanism of H4 (minus the outer case that made it watch-like) is on display in the Royal Observatory. It looks like something out a science fiction movie. It is simultaneously space-ace and absolutely beautifully crafted as if worked on by an Arts and Crafts movement master (note the capital A and capital C there; not an accident). If this thing had popped in in one of the Dune movies (the 21st century ones, not the Dino De Laurentiis one), it would not have looked in the least bit out of place. It's stunningly gorgeous. 

H4. The winner.

H4 was ready for a sea test in 1761, just two years after Harrison stopped working on his 19-year long H3 project. It passed that sea test to Jamaica and it passed a second sea test (this time under competition with other Longitude Act competitors that had gone the non-sea clock route to win the prize) to Barbados in 1764 where it was declared accurate within the constraints of the Longitude Act. Harrison had won.

The end of this story isn't as tidy as that. There were disputes as to payment or whether full payment should be conferred. The Royal Astronomer (Nevil Maskelyne, if you must know) was especially determined to not let Harrison win the prize and kept debating and refuting the effectiveness of H4 for at least two years after the Barbados test. According to the Royal Observatory, Harrison was eventually paid everything that was owed to him but it may have been by Parliament and not the Longitude Board. The description next to H4 says that H4 is "arguably the most important timepiece ever made." Not too shabby for 32 or 33 or years of work, right?

H4 was not the last clock Harrison produced in his life. He apparently was still tinkering with his last clock design when he died in 1776. That's some serious dedication.

John Harrison. Front and center.

There is a lot to see at the Royal Observatory that is not related to John Harrison or the Longitude Act. I'm not sure I can adequately describe everything that they have on display up there at the top of the hill in Greenwich but Wren's building, telescopes and planetary observation history might top my list if pressed. We didn't go to see any of that stuff. We were strictly focused on Harrison's clocks, which (full disclosure) I had already seen in person but which will endlessly fascinate me. It's as much the story as the history.

If you want to go do the same thing (and only the same thing) as we did on this trip, I'd suggest you not ask any of the museum staff "where are the clocks?" We did and our question was answered with a question: "which clocks?"

Yes, there are many, many clocks at the Royal Observatory and fewer than ten of them were designed and built by John Harrison (there are more than four Harrison clocks at the Observatory although I don't know how many; I'm guessing not more than ten). Asking where are the clocks ain't going to cut it at this cultural attraction.

There are some other things to see that are at least partially relevant to longitude and the accuracy of timekeeping. First (and I realize it's a huge tourist trap type thing), the Prime Meridian (or zero degrees longitude) passes through Greenwich in recognition of the Royal Observatory's role in defining longitude. There's a literal line you can straddle with one foot in each of the eastern and western hemispheres. Of course we did this. How could we not? I stood in two hemispheres in Ecuador; I had to do it here in Greenwich.

Second, there is a big red ball on the top of Flamsteed House. It was installed there in 1833 and was dropped at 1 pm each day so that ships on the river in sight of the Observatory could re-set their watches each day. I know I already wrote about the inaccuracy of personal timekeeping devices but it is still astonishing to me that there would be a bunch of ships' captains on the river side of Greenwich watching a red ball drop to re-set their chronometers but I guess it happened. Like every day. The Observatory still observes this tradition today and we happened to be exiting the building at about 1 so we stuck around and watched. I fell like I'm closer to history for doing this.