Whilst walking in the snow i noticed that around electricy pylons the snow had formed a spiky texture similar to that of some cystal structures, all pointing in the direction of the pylons. Is this to do with magnetic attraction of the polar water molecules or something more comlex than my simple chemsitry can explain?
BTW, while we are on translation and explication, it belatedly occurred to me to ask: does the expression "Kuchenbacken" etc have any figurative significance that I may have missed?
Well, that saying just means connecting something that has nothing in common at all except superficial likeness of words, like "backen" - "to bake" and "Backen" - "cheeks", "buttocks".
Steel is (ferro) magnetic and aluminium is nitpickingly slightly too (I think)
Certainly one can "induce" a (temporary) magnetic field even into nothing (vacuum)
Quite often (these days) pylons carry DC (direct current) in their supported wires which induce fairly strong magnetism in the structure.
Slightly off subject - before easy cheap radio detection of lightning srtikes, they use to attach a carefully recorded (orientaion-wise) demagnetized steel cube (or sphere) to some pylons during regular inspections and take the previous one back to be measured for magnetic flux set by nearby lightning strikes and these were used to tabulate lightning occurrence. Obviously if there were 2 or more nearby strikes between inspections only the last was "recorded" By considering a several cubes in the vicinity one was able to get a fair idea of position and strength.
The reason they regularly used pylons was because they offered an above ground mounting point, often traversed remote areas (in straightish lines), were regularly inspected and their positions were accurately known.
ecstacist, I wouldn't be so sure of steel being ferromagnetic. It seems logical because its main component is iron, and there is nickel in some sorts too. But of all the steel things I have tested right now, only the spoons, forks, knives and scissors were magnetic, while a camping plate, bowl and mug and a candle holder and a tea filter (not aluminium all of them!) showed not even the slightest reaction.
Bruce said: "The pylon is not electrified, but fixed to the ground.It's not likely to have to do with electricity...There could be any number of reasons why the ice pointed toward the
pylon like shifting winds and turbulence. Too bad you didn't get a
photo."
in general I agree with him. I do not know the answer, and have nothing to go on to develop any kind of sensible theory, so what ever I say is handwaving.
My guess is that the main factors were fluctuations in temperature near the bases of the pylons. The main effects would be to melt the snow in immediate contact, after which the behaviour of heat and humidity in the hollows around the bases could be markedly different at night and in windy weather, from conditions further away. In warm or windy conditions, larger crystals would survive while smaller crystals would melt, unite, or sublimate. In still, cold, modestly humid conditions, new ice would form, mainly on the larger particles remaining, and often in the form of hoarfrost. The effect would be a phalanx of needlelike crystals pointing largely at the pylons. If this is correct and there are other large metal poles, such as heavy fence posts in the neighbourhood, one might expect them to cause similar effects, but it is unlikely to be a single simple process, so I would not swear to it.