tag:blogger.com,1999:blog-16612221.post945109132562033192..comments2024-03-19T03:14:04.172-04:00Comments on Rabett Run: On Edith Foote's ExperimentEliRabetthttp://www.blogger.com/profile/07957002964638398767noreply@blogger.comBlogger13125tag:blogger.com,1999:blog-16612221.post-10455744387426028242018-12-17T07:55:01.539-05:002018-12-17T07:55:01.539-05:00Ha, now I got it. One could adapt your "green...Ha, now I got it. One could adapt your "green plate" thought experiment, replacing plates by a drum with black foil to the sun and other foil pointing away, filled with gasses the black foil should display different equilibrium temperatures<br /><br />Cheers, Marcus<br /><br />PS how can I register here at Bunnies :-)Anonymoushttps://www.blogger.com/profile/02831911842945615535noreply@blogger.comtag:blogger.com,1999:blog-16612221.post-16475988354815806252018-12-17T04:20:13.938-05:002018-12-17T04:20:13.938-05:00But would it not be fun to make a "real"...But would it not be fun to make a "real" experiment out if this? <br />Maybe a very thin glass like a christmas bauble would let enough IR transmit, including gas and thermometer, with a thin black metal sheet between sun and thermometer to emulate back radiation and cancel direct insolation of thermometer.<br /><br />Cheers, Marcus Anonymoushttps://www.blogger.com/profile/02831911842945615535noreply@blogger.comtag:blogger.com,1999:blog-16612221.post-35189021340212963202018-05-19T17:15:43.039-04:002018-05-19T17:15:43.039-04:00Thanks for sorting this one out, Eli.Thanks for sorting this one out, Eli.Hank Robertshttps://www.blogger.com/profile/07521410755553979665noreply@blogger.comtag:blogger.com,1999:blog-16612221.post-13744357984248024212018-05-07T15:30:33.174-04:002018-05-07T15:30:33.174-04:00JoeT -- the radiative greenhouse effect is shown e...JoeT -- the radiative greenhouse effect is shown empirically by measuring the back-radiation from the sky, with attention to the wavelengths in which it is found.Barton Paul Levensonhttps://www.blogger.com/profile/07630802738456749652noreply@blogger.comtag:blogger.com,1999:blog-16612221.post-64617417225039010382018-05-07T13:59:34.332-04:002018-05-07T13:59:34.332-04:00Thanks for the response. We know there are problem...Thanks for the response. We know there are problems in many of the experiments that allegedly show the radiative greenhouse effect --- especially the one Russell cites in the comment above about Bill Nye. One of the problems is separating out the convective contribution to the observed warming. <br /><br />I'll rephrase my question then. Is it even possible to devise an experiment in a laboratory that would clearly indicate a warming due to the radiative greenhouse effect --- or would such a demonstation require a temperature gradient as it does in the atmosphere?JoeThttps://www.blogger.com/profile/13731366159156041863noreply@blogger.comtag:blogger.com,1999:blog-16612221.post-36165904644200346502018-05-07T01:00:50.276-04:002018-05-07T01:00:50.276-04:00No, JoeT, I'm afraid Tyndall would have not.
T...No, JoeT, I'm afraid Tyndall would have not.<br />The iron tubes of his steampunk apparatus had > 10,000 times the thermal mass of the gases whose absorption he measured, and this thermometers and bolometers had only 100 millidegree resolution.<br /><br />CF :<br /><br />https://vvattsupwiththat.blogspot.com/2014/10/a-very-large-grain-of-salt.htmlTHE CLIMATE WARShttps://www.blogger.com/profile/02578106673226403151noreply@blogger.comtag:blogger.com,1999:blog-16612221.post-50227253260009596812018-05-06T11:16:24.444-04:002018-05-06T11:16:24.444-04:00We know that the greenhouse effect exists because ...We know that the greenhouse effect exists because of the temperature gradient in the troposphere. Tyndall brilliantly measured the absorption of infrared by carbon dioxide and water vapor. If he had looked for a temperature change in his apparatus during his absorption experiments, would he have found one?JoeThttps://www.blogger.com/profile/06540568535579405609noreply@blogger.comtag:blogger.com,1999:blog-16612221.post-45307645930980319932018-05-03T14:35:19.958-04:002018-05-03T14:35:19.958-04:00Didn't know thatDidn't know thatEliRabetthttps://www.blogger.com/profile/07957002964638398767noreply@blogger.comtag:blogger.com,1999:blog-16612221.post-26639484927256802782018-05-03T14:28:43.173-04:002018-05-03T14:28:43.173-04:00Eunice Foote is also noteworthy as one of the sign...Eunice Foote is also noteworthy as one of the signers of the 1848 Declaration of Rights and Sentiments at the Seneca Falls, NY, Convention. The Seneca Falls Convention is often described as the first women's rights convention and was organized by women "to discuss the social, civil, and religious condition and rights of woman".jbhttps://www.blogger.com/profile/10835283301887184369noreply@blogger.comtag:blogger.com,1999:blog-16612221.post-6603897957520310612018-05-03T12:55:21.068-04:002018-05-03T12:55:21.068-04:00While I agree that her methods were probably flawe...While I agree that her methods were probably flawed, it seems to me that she did predate Tyndall in proposing the main idea of studying the interaction between gases and light. Refuting the basis of her experiment, in my mind, doesn't take that away. There are countless pioneering experiments that now we can see as fundamentally flawed, but they still count. Anonymoushttps://www.blogger.com/profile/07982409667756307764noreply@blogger.comtag:blogger.com,1999:blog-16612221.post-63335205661183501262018-05-03T11:13:44.703-04:002018-05-03T11:13:44.703-04:00I read Foote's note after first hearing the cl...I read Foote's note after first hearing the claim a couple of years ago that she had conducted pioneering experimental measurements of the greenhouse effect.<br /><br />Then, and now, my conclusion was that her experimental methods were far too flawed to isolate and detect the very small effects that might be caused by different gases on this scale. Compare this to the extremely careful experimental work by Tyndall and it's clear that his were the first actual measurements of the greenhouse effect.<br /><br />Something I hadn't noticed before: the preceding paper in the volume is <i>On the Heat in the Sun's Rays</i> by Elisha Foote, Eunice (Newton) Foote's husband.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-16612221.post-26098914208836439552018-05-03T07:38:59.447-04:002018-05-03T07:38:59.447-04:00Besides, she was just a girl. An icky, icky girl,...Besides, she was just a girl. An icky, icky girl, with cooties.Barton Paul Levensonhttps://www.blogger.com/profile/07630802738456749652noreply@blogger.comtag:blogger.com,1999:blog-16612221.post-44102736326735088352018-05-02T22:47:06.065-04:002018-05-02T22:47:06.065-04:00Poor Mrs Foote- a few years later , volatile hydr...Poor Mrs Foote- a few years later , volatile hydrocarbons became commonplace, and she might have beaten Tyndall to the punch. If she invented salt optics. Too bad she didn't, but Bill Nye shoud read her stuff so as to get the experiment right the next he tries<br /><br />THE CLIMATE WARShttps://www.blogger.com/profile/02578106673226403151noreply@blogger.com