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2500 x 1500 seems to be the standard size in Germany. BTW: 14 pages and no mention of dark matter yet. Very sensible.

I feared that might happen! I'll see if I can do a pic when I get home but in the meantime, here's another go at a description. I'm talking about the tail board. The tails have been sawn and the coping saw taken to the bits between the tails. That leaves the shoulders at the ends (where the...

At the weekend I cut some dovetails and sawed off the shoulders. It is of course conventional to pare them down after sawing. I always cut the shoulder lines with a bit of depth so as to have the shiny edge to help with the paring. As we all know, the idea is to bring any scruffy bits above...

Joe, is it possible to order a copy of this direct from you, given it is apparently not there on Amazon? Andy.

That point has come up quite a few times. IMO the more you can liberate yourself from numerical measuring of bits of wood, the better the work proceeds. Sometimes it is of course handy to have a number e.g. if for some reason you can't use one piece of wood to mark another and then, as you point...

I bet you've not even thought about worm holes.

The other dots are probably easy to deal with. Suppose our dot started roughly in the piece of space which your chair is occupying now and it expanded to occupy the space which our (still expanding) universe occupies now. Then suppose that just before our dot began expanding there was another...

I'm sure AJB will correct this if it's too far off line, but the idea of the dot is that it is infinitely dense (sort of like oak but more so) and infinitely small which is obviously bonkers because if it has got the whole universe in it and as we can calculate the mass of the universe from...

Because it's a component of spacetime. I think the idea is: no space, no time. But that is another notion that we, as creatures of this universe, find hard to accept.

It seems to me that we have a choice of options to believe in. The problem with one of them is that being physical creatures in this universe, it is almost impossible for us to imagine and that is the Single Dot Hypothesis. How can we cope with the notion of all time and space being contained in...

Try this: https://www.amazon.co.uk/Introduction-Galaxies-Cosmology-Mark-Jones/dp/1107492610/ref=sr_1_1?crid=2SCL2ZDYY0NGO&dchild=1&keywords=galaxies+and+cosmology&qid=1603709481&s=books&sprefix=galaxies+%2Caps%2C281&sr=1-1 Cracking book although the equations should perhaps have a parental...

You learn something every day. @ J-G I'd not heard the equator to N Pole thing before and that is of course also necessarily arbitrary. Agreed about basing the metre on the absolute constant of the speed of light (in a vacuum?) but am I not right in thinking that it still does no more than...

I'm glad you got that little footnote in. It's a get out clause worthy of a politician! And I do admire the sheer audacity of it. The following is to be taken with caution as it is a long time since I did any physics at school: units of time are anything but metric as their start point is the...

That's a good point. A few months ago I asked in the local electronics emporium what sort of printer would be required to produce really classy, more or less book quality documents with graphics e.g. statistical presentations which looked the part. The bloke went straight to a printer which was...

Ah but … the speed of light is an absolute, a bit like a piece of wood: the units in which you choose to measure it- let us compromise on a piece of wood flying through the workshop at less than the speed of light due to frustration at mangling some dovetails - are entirely arbitrary i.e...

That's very kind of you. Mind you, my half lap dovetails still have a tendency to be gappy which puts me back in my place.

If you look at any of the pictures of spiral galaxies, like the Andromeda, just hanging there in space and if you even try to envisage the sizes involved, it is quite mind boggling. And they measure them in light years which is cheerfully non-metric.

Roger, there will probably be somebody on here who will be able to provide you with sound observations which might enable you to put some pressure on the firm via a letter or a phonecall. However, if I were in your position, I would want to consider an appointment with a firm of solicitors...

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Thanks for the tip. I didn't realise that it could be done non-invasively. I suspect that will be a boom industry about a decade from now.