STICKS
AND STONE
A
top engineer has devised a formula to aid budding players of
Poohsticks. The formula uses area, density and a drag coefficient to
help competitors find the perfect twig.
BBC News
For
as long as he could remember, John Poe hadn't had much time for
Wednesdays. The rest of the week was OK, it was a living, he could
handle the work and he'd learned to cope with his boss's moods over
the years. Most people thought the boss was a really clever guy; no
doubt he was, but most people didn't often see the other side of him,
the vanity and rudeness, they rarely felt the sharp biting edge of
his contempt. This Wednesday morning, he knew, would be no different
from all the others. He looked at the clock. About ten minutes till
he got in.
Suddenly,
the door burst open to reveal the boss, his face wreathed in smiles,
his arms spread wide in a warm and generous gesture of welcome.
'Success!'
he boomed. 'Success!'
The
assistant was startled.
'You
mean..... you've found it, then?'
'Better
than that!'
'Better
than that?'
'Let
me explain, young man, let me explain!'
And
his number two stood respectfully aside as the outstanding intellect
of the age, the greatest ever luminary of the Royal Society, a
mathematician, physicist and natural philosopher without equal swept
into the room and sat down.
'But
Tuesdays' began Poe 'is Philosopher's Stone Club night. Has been for
years. You must have looked for it loads of times in every bloody
pub in Cambridge. King's Head last night was it? Anyway, you never
find it and that's what makes you a miserable bugger Wednesdays.'
Sir
Isaac Newton, for it was indeed he, stared coldly at him.
'Right
pub, son, wrong name,' he snapped. 'We don't call it the
Philosopher's Stone Club no more. We changed it months ago,
remember, funnily enough soon after the last time we went to the
King's Head. It's the Lapis Philosophorum Societatis now, or was
till last night. Latin, see. Keeps the riff raff out.'
'So
how does that help?'
'How
does that help? Only that we've got rid of all those useless buggers
running round like it was a bloody Easter egg hunt, rummaging around
looking for the Philosopher's Stone in the cellar or behind that bit
where they keep the crisps or in the outside gents. Stupid bloody
place to look, if you've got something what'll turn base metals into
gold, prolong life, all that, you're hardly going to hide it in the
gents, are you? They wouldn't recognise it anyway even if they did
find it. Handle it wrong and it would probably turn them all into
toads. Not a bad outcome all things considered. Anyway, those of us
with a bit more about us have come to a scientifically impeccable
conclusion, empirical evidence and everything, and we've thought up a
sort of strategy thing.'
'Which
is?'
'We've
give up. There's no such bloody thing. Stands to reason. So we've
turned the club into something else.'
'Something
else?'
'Yeah.
I used my position as Chairman to pose an open question to all
members, get the lads to change the subject, like.'
'And
the question was?'
'What
about all this gravity business, then? They liked that, so that's
what we're called now.'
'What?
The What About All This Gravity Business, Then, Club?'
'You're
not paying attention, son. You are looking at the Chairman of the
Quid Ergo Fiet de hoc Negotium tunc Gravitatem? Societatis.' Tricky
language, Latin, but I reckon that's good enough.'
Poe
rolled his eyes. Newton smirked.
'I
can see you're not in the vanguard of scientific thinking, son. Not
like some of us what is at the cutting edge. Gravity, celestial
mechanics, planetary orbits, all that! It's a very 17th
Century thing. There's a lot of Tuesday nights in the pub in this,
you know. I reckon it's got a lot to do with apples.'
'Apples?'
'Ever
wondered why apples what fall off trees always fall down to the
ground? Not up. Not sideways. Down. Every time. Why do you
suppose that is, then?'
The
assistant shrugged.
'Perhaps
the tree pushes them down, then springs back to where it was.'
'Don't
get clever with me, son. When I want a few Laws of Bloody Motion
invented it's me what'll do the inventing, right? Anyway, you've
already had a go at this gravity business, remember, I had you
watching our apple tree for weeks last year.'
'Waste
of bloody time. It was February.'
'Yeah.
But from that I secretly developed my First Theory of Gravity.'
'And
that is?'
'Stuff
tends to pull other stuff towards it. The bigger the stuff, the
stronger the pull. There's bound to be a formula there somewhere if
I could be bothered to look for it but all that tedious stuff about
radius vectors and inverse square laws and suchlike went out of my
head 'cos of the Philosopher's Stone thing. Not to mention having to
bugger about with classifying cubics, building a reflecting
telescope, inventing calculus – much to the disgust of generations
of schoolkids, no doubt - and all the rest. It's not easy, science,
you know, sometimes I wish I'd settled for a quiet life being a poet
instead. Look at Andrew Bloody Marvell, smug self satisfied little
twerp, spending all day thinking up rhymes for words like 'time' and
'day.' How hard can it be?'
'Is
that it, stuff pulls other stuff towards it?'
'No,
there's more. Gravity must be a seasonal thing. I reckon it's
strongest in Autumn which is what makes apples fall off trees.
Leaves, too. That all uses up quite a lot of gravity so all the
stuff what rots on the ground nourishes the Earth and strengthens
gravity for next time round. Stands to reason. But we – you –
you'll have to do a lot of observations before I can prove it.'
He
sat back, nodding slowly but triumphantly.
'I
think the Royal Society might perhaps then accept my authority in
this matter.'
His
number two didn't much fancy spending all Autumn watching apples fall
off trees, so he decided to change the subject. That was one thing
about old Newton – he might be a curmudgeonly old devil at times,
but you could usually distract him with a problem, real or imagined,
and pretend it required his scientific genius to solve. He was like
putty once you worked him out.
'I
was wandering along the river bank yesterday' mused Poe in a careless
sort of way 'lovely afternoon, punts everywhere, students picnicking
– if that's what they call it these days – and watching some kids
playing a simple game. They'd drop sticks into the river off one
bridge, then run downstream to the next to see whose stick got there
first. One of them wanted to know if there was any way of telling
whether one stick would be better than another. I was wondering' he
added disingenuously 'whether all this gravity stuff of yours might
help. Interesting problem for a keen scientific brain, I thought.'
The
assistant watched with a familiar fascination as Newton's brain
shifted a couple of gears. He was interested after two seconds,
fascinated after three and completely engrossed after four. With
luck this would turn out exactly as Poe hoped. To his surprise he
found himself holding his breath. Sir Isaac for his part was now
every inch the brilliant professional scientist.
'I
don't think so,' he murmured, to the other's dismay. 'Gravity,
whatever the season, will account for the stick falling into the
water, and for the fact that the water flows downhill. Children show
that they understand this by running downstream rather than upstream.
Beyond that though, other factors will come into play. I'll have a
bit of a think - perhaps it's also time to formulate once and for all
those rather tiresome Laws of Motion. That should keep me busy for a
day or two.'
The
assistant was growing tenser. This wasn't turning out how he hoped.
'I
think though' continued Sir Isaac 'that we can defer looking at
apples rotting for a few weeks at least. I would like you to do some
serious research on this game, young man. Spend your summer by the
river. Gather as many sticks as you can. Different sizes; different
trees; with bark, without bark. Measure them, weigh them, calculate
density. Anything else you can think of. Keep a strict record of
the properties of each stick and the time it takes. Recruit as many
students to help as you wish – the physics department will fall
over themselves to help if you call it work experience. Come back in
the Autumn with a detailed report and suggestions for a new theory.'
Bingo!
This was exactly what Poe had hoped for. A summer messing around by
the river pretending to do serious research, lazy afternoons, getting
to know some of the students better – preferably the young and
pretty ones – and if he made up half the results old Newton would
be none the wiser. He realised that his boss was still talking.
'I
think that's everything. I don't expect to see you back here till
about October. Good luck.'
Newton
felt a surge of excitement as he watched him go. This had fallen
into his lap! Getting his assistant to count apples and watch them
rot was always a dangerous strategy – he would get disheartened at
best and mutinous at worst. This way they could both pretend the
sticks business was serious research. He'd already realised the
blindingly obvious fact that the perfect stick was defined by a
formula involving the cross sectional area, the density of the stick
and its drag coefficient. What could be simpler? So what if Poe
came to the same conclusion in his slow and lumbering way? He could
even give his name to this childish game if he wished – Poe-Sticks.
He'd like that. Meanwhile he, Sir Isaac Newton, President of the
Royal Society, had far bigger fish to fry. And now Poe was out of
the way, fry them he would.
His
heart leapt as he turned to the heavy oaken chest in his study. His
hands trembled as he unfastened the various locks and clasps. There
were plenty of them and he broke into a cold sweat as he thought for
a moment that he'd lost one of the keys. But no! Everything was as
it should be. The hinges creaked as he swung the heavy lid open.
His heart missed a beat.
He
had been terrified that he would be spotted removing the prize under
his cloak, and he never did work out what it was doing in the outside
gents of the King's Head.
But
there it was in all its glory! And it was all his! He'd found the
Philosopher's Stone!
ANAGRAM
CORNER
Over
the past few weeks many people have filled acres of newsprint to
explain that they have a problem with Jeremy Corbyn.
So
do I. Mine though is perhaps a bit different from theirs – it's just that you can't expect a decent anagram from a name consisting of twelve
letters including two y's and a j. So I tried one or two variations,
and bearing in mind that Jeremy is famously vegetarian came up with:
JEREMY
CORBYN'S LEADER!
MR BEARD ENJOYS CELERY!
(although he looks less sure about marrow!)
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