Talk:Galileo thermometer

message: So, who invented this thing? Shouldn't that be a BASIC piece of information provided by the article?190.193.201.215 (talk) 04:05, 15 September 2010 (UTC)
replies: text: So far as I can tell, it was on sale from the Natural History Museum in London in 1993 - I can find no earlier reference. It is totally different from Galileo's thermometer.Chemical Engineer (talk) 21:07, 28 January 2011 (UTC)
thread_title: INVENTOR

message: Changed "How to tell time with a Galilean Thermometer" to "How to read temperature with a Galilean Thermometer:" Also, it states that as temperature increases density increases... this is incorrect! Absolutecaliber 01:00, 12 November 2006 
(UTC)
Question not answered.  I have the condition that one day the bulbs are all in a sequence at the top of the glass and then later on they are 
all at the bottom.  No gap so how do you read the temperature?  —Preceding unsigned comment added by Froglips (talk • contribs) 23:04, 27 April 2008 (UTC)
thread_title: Minor Edit

message: Wow, people! Hi. At my school, we had to research an invention that involved math. I chose the Galileo thermometer as my invention, and it is really cool! It even led my dad to buy me one! Galileo thermometers may seem a bit (okay, maybe really) boring, but for people like me, it's, well, totally awesome. I don't want people to think i'm a geek or anything, but hey, science is cool.
--KiraNerrice 03:01, 25 Feb 2005 (UTC)
thread_title: Misc. comments

message: The basic facts in the previous dicussio,n are correct, but the conclusions are wrong!
The Galileo Thermometer actually measures pressure in the first instance, the pressure being caused by the change in ambient temperature.
The AIR in the top of the sealed container is heated by the outside temperature and it expands, applying pressure to the surface of the liquid, which is incompressible.  This in turn compresses the oval floats which then start to sink because of their increased density.  (their weight stays constant but their volume decreases)
To demonstrate this, take a thermometer, ensure it is stable and then wrap a piece of ice in a wet cloth and hold it against the glass where the air is. The air will cool down and the floats will begin to rise.  There will not have been time or sufficient energy outflow to change the liquid temperature.
:Afraid not. Buoyancy has to do with relative densities, and since most fluids are relatively incompressible, more or less pressure at the surface is not going to change the density of the liquid or the bulb. Of course, if the bulbs were not sealed on the underside, and had some air on the inside, their effective density would change with a change of pressure at the surface and they would rise or sink. There used to be some toy like that, where the position of a diving man was controlled by pressure on a flexible membrane. Paul venter 14:52, 15 June 2007 (UTC)
thread_title:  How it really works 

message: Any chance of getting this page partially locked? There seem to be an odd number of random vandals about. -SabineLaGrande 07:58, 15 November 2006 (UTC)
thread_title:  Vandalism 

message: Although the statement comes close to reflecting the logic of the operation of the thermometer does it or should it include the following.
"As the temperature of the solution in the thermometer increses, the density decreases, and the weight of the water displaced by the floating piece also decreases. Eventually passed a certian point, when  the weight of the water displaced becomes  less than the weight of the float, then it will sink.  The converse also holds true.
This is an example of a relative/absolute truth.
--Caesar J.B. Squitti: Son of Maryann Rosso and Arthur Natale Squitti (talk) 22:15, 28 February 2009 (UTC)
thread_title:  Missing logic. 

message: Can you please put in more history in this article?  —Preceding unsigned comment added by 86.14.219.223 (talk) 17:03, 23 March 2009 (UTC)
thread_title:  More? 

message: What we now call a Galileo thermometer is quite different from his thermoscope.
See http://galileo.rice.edu/sci/instruments/thermometer.html for a picture of a thermoscope.Chemical Engineer (talk) 22:48, 2 July 2009 (UTC)
thread_title:  Thermoscope 

message: This Wiki really surprised me, as far as it's length it seems about right. But it is structured incorrectly, the explanation of how the Water Thermometer works is entirely to long and despite the very lengthy explanation, it is accurate but not a good explanation. It also is not a Theory, we know how it works. I am quite surprised this Wiki has not been attacked by the usual suspects who hit nearly every scientific Wiki I have ever read, you know, the guys that comb over every word, punctuation, required structure, etc. If you don't know what I mean you don't visit many Wiki Discussions. Unlike the usual suspects I'm not into this part of it enough to "report" this Wiki for review or whatever other threat they use, but this Wiki should be cleaned up and restructured. Two sections is not the norm.  —Preceding unsigned comment added by 75.17.209.222 (talk) 16:18, 7 November 2010 (UTC)
thread_title:  ARTICLE NEEDS SERIOUS WORK 

message: Although it can be illustrated both ways, I believe the figures would be more clear if the vapor space inside the hollow objects were drawn clear (white) rather than blue which implies there is liquid inside the object.  Figure 2, for instance, would look like it were displacing the blue liquid if drawn without the blue rectangle within the green object.  —Preceding unsigned comment added by 209.99.19.8 (talk) 17:19, 2 December 2010 (UTC)
thread_title:  Figures 

message: I find it confusing that we have conflicting statements. in the article on Galileo Galilei it mentions under 'career as a scientist' that he 'created a grossly inaccurate thermoscope', and links to this page. In this page it mentions that it is simply a namesake, which is a bit confusing. I think someone should fix this. Carnivorousfungi (talk) 12:26, 20 April 2012 (UTC)
replies: text: I have corrected the Galileo entry, which was in any case poorly phrased as well as incorrect.Chemical Engineer (talk) 15:16, 21 April 2012 (UTC)
thread_title:  Consistency 

message: The Dutch Wikipedia gives the impression that Galileo invented the only accurate thermometer.  — Preceding unsigned comment added by 212.7.192.143 (talk) 13:22, 21 November 2012 (UTC)
thread_title:  Impression 

message: I think that this Galileo thermometer works mainly because of the small expansion coefficients of glass relative to whatever liquid is used in the tube.  Sealed glass bulbs of fixed mass and approximately fixed shape regardless of temperature and pressure would rise to top or drop to the bottom depending on the temperature-dependent density and therefore pressure gradient of the liquid.  Finer details as to the position of a bulb that becomes suspended between surface and bottom may reflect (1) the slight dependence of the bulb shape on temperature and pressure and (2) the deviation from linearity in the pressure increase in the liquid from top to bottom.David in Cincinnati (talk) 15:19, 11 December 2019 (UTC)
thread_title:  Details