ozjohn

https://www.ebay.com/itm/1913-Great-Britain-Florin-2-SHILLINGS-KM-817-NGC-MS-62/322982118893?hash=item4b333c05ed:g:AuYAAOSwlPFeMxHD I don't think this one qualifies for a MS grading. There is a serious metal flaw on the obverse, signs of wear that cannot be explained by a weak strike, and many bag marks on both obverse and reverse. Below is scan of my example is included a coin I have had for many years and brought it at MR Roberts, Wynyard, I think it was less than $Au 50. IMO I think this coinis somewhere in the MS range.

I have a bag of .500 and .925 silver coins weighing close to 1kg taken from circulation. I'm sure lots of other people have hoarded them.

Either way changing history for ideological reasons or inadvertently or for personal gain is not a good thing. Museums are supposed to be a record of what happened.

Fortunatly not many people live in the area. Cyclones on the east coast are a different matter.

Or someone trying to rewrite history? I'm sure imperial connections are not encouraged by the present regime in SA.

I saw Alistair Campbell on a ABC program called Q&A which is a current affairs program with the panel and audience stacked against some hapless right wing politician who is stupid enough to appear on the program. Much of the content is focused on climate change. In this case Campbell was attacking Brexit , the world's about to end , economic ruin, the electorate are stupid etc. etc. without any justification for his views.

. . I appoligize for my initial scepticism but I guess that's the engineer coming out never accept anything on face value. I have to say your post was the first I have heard of thermoradiative cells and I have not seen anything so far from the renewable energy brigade in Australia. Thanks for alerting me. It seems that these theromradiative cells are like the QM equivalent of heat pump where a small amount of energy is expended by radiating it out to outer space and drawing a greater amount of energy from the environment which in turn gives electrons the energy to jump into the conduction band and become available as useable energy. I guess I was too tied up with the operation of conventional PV cells to see the difference. Thanks again for alerting me to this new technology.

If that were the case they wouldn't be attempting to reverse the action of PV cells as suggested in the article. The PV cells would be operating in the conventional mode as if they were facing the sun ie they receive a quanta of IR from the warm house which energizes an electron to jump into the conduction band and available to produce a potential across the PN junction of the PV cell. A PV cell receiving IR radiation from a hot surface would certainly generate electricity providing the doping of the semiconductor was consistent with the wavelength of the quanta of IR emitted from the warm house. but 50W/m^2 ? This very optimistic, also as the night cools so would the radiated power from the warm house reduce thus reducing the PV cells output further. When I read the article it seem to imply that the PV cell was radiating to outer space which has a temperature of 4 deg K ( absolute zero 0 deg K or -273 deg C) which by some unexplained process released energy up to 50w/m^2 in the reverse direction to a conventional PV cell. For this to happen the energy has to come from somewhere or someone has found a way of getting round the laws of physics which is unlikely. If this were the case perpetual motion machines would become a reality coal, gas , oil and nuclear would be redundant.

Redcliffe update. We've had a cool change today 26 degC max. with rain. Tomorrow's forcast 22 to 25 degC with rain, 100mm. Sea temp. 27 degC.

I looked at your reference and I am afraid I am sceptical .Conventional PV cells work by receiving a quanta of light energy which allows an electron to jump into the conduction band and become available as energy. Current PV cells have an efficiency of less than 25% with 30% the maximum which is set by quantum physics not engineering. For a current 1m^2 PV cell normal to the sun would receive about 800 W. and output about 200 W. In your anti PV cell reference it is suggesting that radiating from the cell to outer space energy can be generated. To start radiating energy to space this would represent a loss in energy to the system and each quanta of light emitted would require electrons to lose energy binding them more tightly to their parent atom making them less likely to be in the conduction band. In quantum mechanics never say never but the probability would be low. The reference does not attempt explain where the generated energy through the loss of energy comes from remembering that energy cannot be created or destroyed the fundamental law of thermodynamics. It has to come from somewhere your reference vaguely suggests that the PV cell process is reversed and this energy from nowhere is available in the opposite direction which is not convincing for the reasons given This one sounds like a perpetual motion machine.

Air conditioning is good but expensive to run. We run the air conditioning in the day as we have roof top solar PV cells At night we have ceiling mounted fans which are good and cheap to run I would like to have lithium batteries such as a Tesla Powerwall as a backup at night and cloudy days but they are very expensive approx. $12000 and are not cost effective as they would not break even until after the warrantee period of 10 years had expired. Such is the drawback with renewables they cannot deliver a reliable supply without some form of backup. I don't think anyone has thought too much about the disposal/recycling of lithium batteries which contain lithium which is a very reactive metal.

Beautiful one dayday perfect the next is what they say about Queensland. Don't mention the cyclones and bushfires.

Sorry F+/F

It seems that the wear on these Victorian pennies can be quite uneven. In the example you quote the wear on the head is light and that part of the coin and is closer to EF. However looking at it again at the coin in question the wear of the Queens dress. It's too much for VF although the head probably qualifies for that description. but the notes provided by Allen in Grading British Coins say the pattern on the dress should still be visible but in this example the pattern has worn away. It the light of this I still think it's a tad above F so let's say F=/F.

I would be nice to put some faces of people on this forum but a long way from Australia. I 've sunk a few wheat beers and Dunkels ( barley and wheat) in Munich in the past. In fact where we were staying was across the road from the Paulander brewery. As it happens last night my wife and I went to see The Book of Mormon at the Lyric Theater in Brisbane. Afterwards we ate at the Bavarian restaurant on Eagle Pier where I had a ham hock washed down with a liter of Paulaner dunkel beer.

After consulting Allen's Grading British Coins I would grade this coin as obverse VF and the reverse gF.

Brisbane Courier Mail 31/01

Noted on the Daily Telegraph online just over a day to Brexit and still counting.

I noticed this coin on Ebay and was impressed with the strike quality and brought it for GBP 16. Pity it has been cleaned but it shows what the quality of these coins can be when properly struck. Given it only cost 16 quid who's complaining.

Thanks.

If you didn't go to Oxford why use it unless you are trying to impress. I was taught at school to put a comma between the list words and not after the last word on the list in front of the and. I was also taught not to start a sentence with an and or but however we spent many hours in analysing sentences into pronouns , prepositions, verbs, nouns, adverb clauses, subjunctive clauses etc.

Looks like the new Queen coin suffers fbrom the same poor design.

In Australia the 1 and 2 cent coins have gone. Five cents being the lowest coin which is equivalent to the old sixpence and is the same size as the old sterling coin to this day as are the ten cents, one shilling and twenty cents, one florin. I think Australia is the only place where the original imperial coin sizes have been retained. Of course the fifty cent and the later one and two dollar coins were of a different size.

There' probably a future for the green folding stuff. I always carry 50 to $100 in my wallet but as for low value circulating coins that's another matter

I've noticed in recent times a dramatic fall in the amount coins that I receive in change for day to day transactions.Perhaps we should consider if coins are going to feature as a future medium of exchange given the rise of debit cards and tap and go transactions. In addition the value of circulating coins is so low because of inflation.the cost of coins can exceed their face value. The future of circulating coins may well be limited. This may explain the lack of effort shown in producing new issues and circulating coins.