SHORT: Galilean Thermometer
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- เผยแพร่เมื่อ 20 ธ.ค. 2023
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The Galilean Thermometer uses the movement of glass balls of differing densities inside a fluid column to measure temperature. Despite its name, however, this instrument was not invented by Galileo Galilei but rather a group of his former students decades after his deaths. Nor was it widely used after its creation, only being resurrected as a museum gift shop product in the 1990s.
SOURCES:
www.rmets.org/metmatters/wher...
pubs.acs.org/doi/10.1021/ed20...
time.com/6053214/thermometer-...
quod.lib.umich.edu/e/eebo/A24...
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Time for the museum to release the individual column version reproductions for sale.
Ooh! I've got one of these! I've had it since I was a kid and asked for one for Christmas (I was a weird kid and now an even weirder adult lol). It's fun to hear the history. Thanks!
I love Technology Connections Canada. Now all he needs is to say "Through the magic of buying two of them." Quality work. Thank you.
My wife bought me one of these, only it's about 18" (~45cm) tall. I built an oak sconce with a mirrored back for it and it has been proudly working in our living room for the past 20 something years. I still get complements on it from the people who see it for the first time. Subscribed! Good video.
I have exactly the same one. It works quite well indoors. For outdoors the range is not big enough. It does not work the way as its shown in the animation here - there is always only one bulb moving, not a group. And its not that slow in reacting to changes either.
Over all a pretty useful thing, and it looks cool as well if its illuminated. And it doesn't need batteries.
I have had one in in my kitchen window since I built the house in 2005. Where is lacks in accuracy it makes up for comment from visitors.
From the obscure to more familiar items it's always interesting and I usually learn something new about the items I'm familiar with.
You're one of the few creators who I can be confident they actually read the books behind them.
I have a larger Fahrenheit model of this, obtained from one of the various education novelty retail stores which were in US malls in the late 1990s, measuring 64cm/25Inches tall and able to indicate 62-82F in 2 degree increments. The tags have a silver color but their composition is unknown - could be nickel plated brass or another metal.
As it is on my desk and my roommate has a cat who sometimes roams the part of the house where my office is i decided it needs support. I purchased a retort stand and a clamp for a microphone boom. Dispensing with the weighted base of the stand I clamped the vertical rod into the microphone boom mount which I then clamped onto the edge of my desk. Next I stood the thermometer next to it and slid the rings into place constraining the thermometer's lateral movement.
I retained the packaging since it has a specially fitted foam insert and it was made by TFA, a German company who seems to go by TFA Dostmann today and lists several models, including this size, as currently produced.
I have a suggestion for a future short video. Your opening sequence where you rapidly advance though a number of old b&W photos, perhaps you could display each one on the screen while you discuss briefly what each one is. Just a thought.
Oh, I second this. Good idea.
I am in no way associated with Gilles Messier (other than living on the same planet) and I agree that this is a good idea. In fact, it is such a good idea that I have been working on just such a list for the last few weeks. This was prompted by my recognizing the subjects of several of the photos which then made me curious about the others. There are 11 photos in the series and I have the particulars on most of them now. I'll hopefully complete the project in the next few days and will post the list here when it is complete.
I sort of changed my mind because a complete list of information I have managed to come up with for the 11 photos of Gilles "Our Own Devices" introduction would make for a very long TH-cam comment! I decided to break it up into installments of information about 2 or 3 photos at a time. Here is the first installment. If you like this let me know and I will post more installments:
Photo 1: Observers watching a thermonuclear bomb test at the US Pacific testing range. This detonation was part of the Hardtack 1 test series which consisted of 35 nuclear detonations between April 28 and August 18 1958. The particular test shown in the photo was named “Oak” which was detonated on a barge on the surface of the ocean (so basically a surface atmospheric test) near Enewetak Atoll at 07:30 local time on June 29 1958. It was a thermonuclear device with a predicted yield of 7.5 Megatons and an actual yield of 8.9 megatons. (After all, what's 1.4 megatons between friends?)
Photo 2: Photo of the control room of the Battersea “A” power station taken July 1933. The Battersea power station was a large coal fired electricity generating station located in London England. It was constructed in 2 parts, the first, Battersea “A” as seen in the photo, was constructed between 1929 and 1935. It had 9 boilers and 3 turbo alternators with a combined nameplate output rating of 243 megawatts. The second part (Battersea “B”) started construction in 1937 but construction was paused in 1941 due to the effects of World War II. The B section of the station was eventually completed in 1955 and had a nameplate rating of 260 megawatts. The 2 sections of the plant were very similar which resulted in the 4 stack structure commonly recognized today. One example of its use in popular culture was the cover of the Pink Floyd album Animals where a large inflatable pig was suspended between 2 of the smokestacks. The A station was decommissioned in 1975 and the B station was decommissioned in 1983. After remaining unused for many years the building was redeveloped in 2022 as a shopping mall, apartment complex, and event venue.
Photo 3: Skydiving from the edge of space. A photo of US Air Force Captain (later Colonel) Joseph Kittinger just as he stepped from his Helium balloon supported gondola on August 16, 1960, at an altitude of 102,800 feet (31,300 m). This jump was one of 3 jumps that comprised Project Excelsior which was a US Air Force project designed to develop a multi-stage parachute system that pilots of high altitude jet aircraft could use to successfully descend to earth after a high altitude ejection. In October of 2012 Felix Baumgartner, as part of the Red Bull Stratos project set a new record for jump altitude of 127,852 feet (24,214 Meters) An interesting aspect of Project Stratos is that one of their technical advisors was Joseph Kittinger, who was at that time in his mid 80s.
@@Vincent_Sullivan Wow, very in depth and interesting so far. I'm eagerly awaiting your next set of photo deep-dives.
A short that doesn't suck!
This video was... Maaaagnificoooooo...
I have the Farenhite version of this. Only 5 balls are in it. I like this as it gives me an estimate of the temp.
Great video, thumbs up 👍, recently found this channel, amazing what is learned compared to assuming and taking for granted on alot of these items, still watching a lot of the old videos also
Love your stuff!
I love these things, was fascinated with them as a kid since seeing them in one of those old mail order catalogs, eventually got given one for xmas, and still have it.
My aunt had a Fahrenheit one that looked almost exactly like this one.
Dope visual for density.
Your description of Galileo’s invention sounds a lot like a lava lamp
Lava lamp,haven't heard anyone mention those in a long time, the memories
Now I want a thermometer scaled in Santorios... 🤪
Or rankine
Giles, I was looking for videos or information about acoustic listening devices used to detect aircraft prior to the invention of radar and was wondering if you'd do a video about them, they seem to be the type of thing that suits your format. I don't even know what to call them, exactly, which makes it difficult to even look them up.
I was gifted one of these devices, as a teenager, a few decades ago.
It was received along with a warning to " *_never_* invert the device". Supposedly this would permanently damage or disable it. I never tested this peice of advice, but I've always wondered if there is any truth to that claim. I don't really see how such an action could cause any significant/long-term problems. Surely this must happen rather often during shipping and/or storage. I've always assumed that statement was an 'urban legend'/'wives tale', but I also didn't want to personally test it with my own example, just in case (due to sentimental value).
Does anyone here have any input on this specific idea/claim?
I doubt it's true, as the device is almost guaranteed to be inverted at some point during shipment.
Probably risk of turbulence with large air bubble moving in the tube. Could cause glass balls to slam into each other and break. Also could cause hanging temperature tags to get tangled or wedged in tube.
I presume it's more in case the floats get damaged, when I moved house I transported mine laid down on front seat of my car wrapped up in clothing.. for 400 miles. I was terrified I would break it enroute, but it was fine
Is this a repost? I swear I already watched you talk about this device.
That was probably the "Fitzroy Storm Glass", which was presented a while ago. It had the same shape glass tube.
I have seen this vid before also. I'm sure of it.
I think it is, or at least and edited version of one. I'm leaving comments to help Gilles, because the algorithm HATES reuploads.
I have had one just like the one pictured since 1999.
i've had mine since 2009.
Cool - Thanks ! 😎👍
I have one of these! It makes a great desk accessory, that's about it though.
5:20 You're burying the lede here, concealing the fact that Galileo invented the lava lamp at the back of the video.
Ich hatte dir die Kelly Kettle als Vorschlag gegeben. Das Prinzip der Wassererhitzung beruht auf dem Kamineffeckt. Diese Erfindung stammt aus den Anfang des vorhigen Jahrhunder. Interessant ist das man dieses Prinzip in dem russischen Samovar, in deutschen Badeöfen oder stehenden Dampfkessel ( für Dampfmaschinen ) findet.
Das wollte ich noch hinzufügen.
Die Geschichte des Herren Kelly ist interessant. Er hatte seinen Kessel erst nur für sich, dann für Freunde, in kleinen Serien produziert.
Ein Produkt von einem Angler für Angler die nicht auf ihren heißen Tee verzichten wollten. Die Produktentwicklung geht bis heute weiter. Interessant ist es das sie trotz ihres Alters relativ unbekannt und Stiefmütterlich behandelt wird.
So is the thermal effect flowing into the clusters considered 'cluster flux'?
Normally I really appreciate your videos but ... did I miss it? ... how does and to what degree does the fluid in which the glass balls are suspended change density? As we know, water responds strangely volumetrically to temperature so how did they come up with the particular water/alcohol mixture for the suspension fluid to expand the way they wanted with temperature? Why isn't it ALL alcohol? You skipped past this despite this lying at the very core of the thermometer's mode of operation. And how quickly does the entire column of suspension fluid equilibrate to temperature changes? (You did mention I admit, it responds to temperature change quite slowly.) Is the glass column/container made as thin as it safely can be to speed up the response? I have one of these thermometers, and what I admit I didn't know is that a more accurate temperature reading is obtained by taking the temperature half way between the sunken bulb at the bottom of the gap and the next one, at the top of the gap. I hadn't realized that the system is designed for neutral (floating) buoyancy of the appropriate bulb - but thinking about it, of course it does! Thank you for your explanation.
My dad had one and gifted it to me, must’ve been at least 50 years old. Sadly he knocked it over and broke it just last week :(
At most 33 years old.
First! Shout out for the late night entertainment! Thank you sir.
8am in Finland 🤷♂
Neat
Daniels painter did him dirty he looks like an ai painting
Is this a re-upload? If it is I know that the algorithm hates that so I'm commenting for engagement
Never understood how to read these
Shouldn't you have played an excerpt from Bohemian Rhapsody as the intro?
Erster 😊
Kommentar🎉
& erster Daumen hoch.
In Deutschland ist es 7:00Uhr
Ich wünsche allen einen guten Morgen.
1:10 am in Florida. Good night 😅
Delaware same as Florida 👍
@@yo388gute Nacht meine lieben. Ich wünsche euch schöne Weihnachten 🎄 und einen guten Rutsch in das neue Jahr 😊
eastern time club....!
@@andrepohle7485Du auch guten Morgen. (Es tut mir Leid, mein Deutsch ist arm)