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>>> --_000_48E56AE25A3B4E9C97C00853DA3DFEA9dalca_ Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable We had a set of those growing up as well, but they came in a different box.= Mechanically, they were pretty simple, a cone resting on a point so there = would be little friction. My brother and I used to flick the piece that the= angels hung from to see how fast we could get it going before the angels f= lew off so it was pretty robust! One thing that I could see that might prevent it from turning is if it star= ted with one of the hanging pieces right against a chime. We ran into the p= roblem a few times when using candles. It seemed as though it needed a bit = of initial freedom to move before it hit a chime... after that it was fine = as long as the candles stayed lit. Given the wariness people have of leavin= g candles unattended they do not seem as popular now as they once were as m= any of my uncles and aunts had them too! Pat On May 28, 2020, at 3:07 PM, David Webster wrote: CAUTION: The Sender of this email is not from within Dalhousie. Hi Pat, I think you were replying mostly to Nancy but you reply conflicts direc= tly with my recent experience. That stove blacking made a huge difference. Whether the Angel Chimes stopped turning reliably 12 years ago, earlier= or later I can not be sure; not a high priority. But in the previous 4 yea= rs, perhaps more, it just had not turned. I left it there with intent to so= me day take it apart to see if the unknown fault was reversible. As it turned out wear of the unit, or other damage, was not the problem= . And the blacking was applied so the stove would not look so neglected. With just a light fire it turned like new. So the 'cure' was due either= greater radiant heat from the stove upper surface or black magic. I prefer= greater radiant heat. The Angel Chimes are not black; image below. https://mygrowingtraditions.com/blogs/news/15734508-the-original-swedish-an= gel-chimes YT, DW On 5/28/2020 12:36 PM, Patrick Kelly wrote: When it comes to blackbody radiation (and most things are pretty close to t= hat if they are solid, liquid, or a dense gas) the amount of radiation that= they emit at various wavelengths depends only on their temperature. https://en.wikipedia.org/wiki/Black-body_radiation When it comes to absorbing radiation, the colour does matter. In visible li= ght, an object that looks red, does so because it absorbs all other wavelen= gth in the visible part of the spectrum and reflects red light. An object t= hat is black (in the visible part of the spectrum) will act a lot more like= a blackbody (absorbing all wavelegths of visible light) while a white obje= ct will reflect all wavelengths. The finish (matte or glossy) would also ha= ve some effect. I expect that a black fan-like device on stove will be more= strongly powered because the black allows it to absorb more infrared radia= tion from the surrounding stove than a gray one, thus getting hotter. Pat On May 27, 2020, at 11:11 PM, N Robinson wrote: CAUTION: The Sender of this email is not from within Dalhousie. Re the blacking, when living in Montreal in an old house with hot water fur= nace and radiators , I wondered at a certain point if the radiators would r= adiate more heat if they were painted black. I couldn't find anything on t= he net, probably because I did not know what question to ask. It was just = a hunch, because black absorbs more heat; but this heat would be coming fro= m the inside, so to speak...? Still don't know but perhaps David's discovery holds the answer. I did not paint them black and did not use my chimes to test anything. Nancy On Wed, May 27, 2020 at 10:44 PM David Webster <dwebster@glinx.com<mailto:d= webster@glinx.com>> wrote: Hi again Henk & All, Original box found; says "Swedish Angel Chimes" on main panel: "Angel C= himes A Product of Swedish Handicraft" on end tab. YT, DW, Kentville -------- Forwarded Message -------- Subject: Re: [NatureNS] Stove Blacking and heat transmission Date: Wed, 27 May 2020 08:44:56 -0300 From: David Webster <dwebster@glinx.com><mailto:dwebster@glinx.com> To: naturens@chebucto.ns.ca<mailto:naturens@chebucto.ns.ca> Hi Henk & All, It is one of these effects which must be seen to be belie= ved; the difference between 'black and white' (via dull grey). That Swedish= connection may be in error. Will be on the lookout for the original packag= e likely about 50 years old. Dave W. On 5/26/2020 9:13 PM, Henk Kwindt wrote: Hi Dave and All, I don=92t really have anything to add to your explanation but I thought it = interesting that you have one of those =93angel carousels=94! We have had ours for at least 40+ years, they were quite popular in The Net= herlands in the 60s, didn=92t know they came from Sweden. Ours is packed with other Christmas decorations so it is being placed on th= e stove every year in Dec. We have not used the candles to =93power=94 it for a long time. Since we have a more modern high efficiency stove the black top is not dire= ctly accessible so I won=92t be able to repeat your experiment. Henk Kwindt, Cow Bay, NS. On May 26, 2020, at 7:47 PM, David Webster <dwebster@glinx.com><mailto:dweb= ster@glinx.com> wrote: Hi Steve & All, No my mill is powered entirely by upward flow of warm air; a thin circular = sheet of brass clipped to form eight vanes which slope downward to the left= . This fan consequently turns near side to the left. (Clockwise viewed from= above). The original unit, made in Sweden, was powered by candles and intended as a= Christmas table decoration. The fan is supported by a brass plate with three arms on each of which an a= ngel hangs and a brass rod hanging from each angel rings a chime as it turn= s. I just stuck the working parts in a support made from a length of burned ou= t oven element, bent to be stable with the filling removed from the vertica= l end by tapping. Just to confuse matters; note that what we call clockwise (down on the righ= t side) is counterclockwise from the clock's viewpoint. YT, Dave W. On 5/26/2020 5:53 PM, Stephen Shaw wrote: Hi Dave, I=92m not familiar with your named device or its principle of operation, bu= t we too have a small windmill that simply rests on top of our (also black)= wood stove and spins faster as the stove