This year also sees the two of them invited to something called the "Slug Club".
So, they're supposed to turn an oyster into a pearl. There are several possible layers of metaphor he can work with here: creature to non-creature, rough to polished, manufacturer to manufactured... hmm.
No, that's too broad. Something more specific to the matter at hand. Pearls—he has read up on those—are generated when a minuscule irritant finds itself trapped within the oyster's folds. They create a "pearl sac" around the irritant and start depositing certain chemical compounds inside it in an immune response.
From that stuff like irritation, threat, immunity, trap, chemical compounds...
What materials does he have to work with?
Although Slughorn has warned them that some of the materials are red herrings, they have been provided with a variety including stinging nettles, sand, ragweed, some sort of mucus with a smudge on the label where it might describe the source, corn starch, and unicorn tail hair.
Okay there is just no way the unicorn tail hair has anything to do with it. Now, stinging nettles and ragweed might have something to do with irritation, but sand is stereotypically linked to the fabrication of pearls—though he has in fact found out that they're not nearly as common sources of pearls as most believe. And as it is, given that a grain of corn starch has a higher probability of actually getting stuck inside an oyster...
His first guess goes along the line of stinging nettles as a metaphor for "irritant" and as little corn starch as he can get as a metaphor for "microscopic." He eyes the unicorn tail hair again with suspicion but decides not to question himself this early in experimentation—counterintuitive ideas will have their turn after the intuitive ones have all failed.
Now if he coats those with mucus... should he burn them? He feels like he should burn them.
What's Miranda even doing?
...wait aren't they supposed to actually do things here he thought they were supposed to actually do things instead of just figuring out what they wanted to do and then waiting to be corrected.
Oh.
Yeah he was definitely going to be the first one in the Hospital Wing, wasn't he.
More ideas! Using sand instead of corn starch because it's ingrained in people's minds that sand is related to pearls, using sand on top of corn starch for the same reason, he cannot think of a single good way to relate unicorn tail hair to this so he mostly doesn't, he also permutes the irritants...
Miranda stands up. "I think the cornstarch is a red herring. I'm not sure any of the other things are but my procedure uses stinging nettles for irritation, sand for time, and unicorn tail hair for beauty, and I'm mostly guessing for the actual steps but I'm thinking wrapping the oyster in the nettles, burying it in sand or maybe dribbling the sand into a pile nearby, all in a circle of a unicorn tail hair, followed by burning the nettles away from the oyster?"
"Nicely done for a first attempt," says Slughorn. "Five points to Ravenclaw for a plausible procedure, although before you actually try it I'll want to make a small few adjustments. Mr. Woods."
"Either stinging nettles or ragweed for irritation, I didn't see any particular reason to choose one in specific. Actually, saying this out loud, I'm thinking maybe using both because one of the things they have in common is being irritants so together they might be more obviously about that than about something else. I didn't think the corn starch was a red herring, my main thought about it was that a single grain is really tiny so it could relate to the fact that irritants that produce pearls are typically microscopic. I didn't think of time at all, and the only reason I saw for sand was as something to reinforce the idea that 'this will become a pearl' because sand-makes-pearl is so ingrained in people's mind. Erm. I thought the unicorn tail hair was a red herring, and that the unspecified mucus could correspond to the process of creating a pearl.
"So what I thought for the actual steps would be wrapping sand and corn starch in nettles and ragweed and binding it all together with the mucus, then burning it and sprinkling the oyster with the ashes."
The other three students' ideas are all as different as Sadde's and Miranda's. Apparently there are a lot of plausible ways to do the thing. No two people agree on which ingredients were red herrings; the Gryffindor even thought of something to do with the banana leaf.
Slughorn gives a brief and jolly summary of how this is the beauty of alchemy and he hopes to see everyone's creativity burgeon over time even as they learn more constraining principles that will keep them out of the hospital wing. And then Miranda is told that she needs to dribble her time sand onto some of the mucus, and Sadde needs to not irritate his oyster to death and remove two of the three representations, and so on and so on - and now that no one is about to set their eyebrows on fire, they may proceed!
Really different kinds, too. Sadde's is a freshwater-looking thing of irregular shape. Miranda's came out gold; one of the other students got five seed pearls; another got something pink, and the second-year Hufflepuff - surprising even Slughorn - somehow managed to get a chunk of mother-of-pearl instead.
They are assigned essays on why they got the specific results they did, another five chapters of reading, and sent home.
"I have nnnno clue," he says. And then, as usual when he starts with that, he follows with: "Actually, I think the most obvious thing might be that the shape of the leaf envelope might have influenced stuff. Maybe if I'd made a neat little sphere of mucus around sand and corn starch it'd have been better."
"Yeah! I mean, we had to find the 'right metaphor,'" air quotes. "For something relatively simple like Transfiguration there are many possible metaphors but stuff that magic has trouble with like life and death finding the right metaphor that will convince it something-or-other should exist can be pretty hard and there wouldn't be a specified way to do it. Especially because to make a Panacea or a Stone we don't have an obvious target like an oyster to stimulate."
The first meeting of the Slug Club is shortly after Miranda's birthday. Slughorn gives her a birthday present at the club meeting - it's a book of alchemy metaphors. Everyone goes around the room and introduces themselves and Slughorn hints here and there about why people were invited. Not literally all of their alchemy class is missing - whether the Gryffindor wasn't invited or didn't choose to come is unclear. Some of the students present have important families, some are academically promising, one 'Puff girl has no obvious distinctions and Slughorn doesn't mention any but it might have to do with how just plain popular she is. Food is served. It's designed for a slightly more advanced palate than the average preteen has.
In a very, you know, casually-eating-hors-d'oeuvres, commenting-on-stuff-with-interesting-and-s
He kinda wishes it were better known that Miranda's father was a muggle so that he'd have a stronger case.
If he had been the one organising this, he knows which it'd have been.
He shrugs. "Yeah I dunno." He shakes his head. "Anyway. Any more concepts related to production of things? Or, maybe, to transformation, since the Elixir might be transformed and gold definitely is. Butterflies? Or maybe just their cocoon? Actually I think lots of insects do stuff like that, and tadpoles as well..."
"Yeah but this would just be the metaphor for the transformation of other metals to gold itself, not for the end product. I mean, I think our metaphor will have to either be pretty detailed or pretty unusual or something; just using something vaguely related to immortality and gold probably won't cut it."
"Oooh, yes, good! How would we metaphor that, though—wait, nevermind, brainstorming time, we'll worry about the 'how' later. What other muggle science things could be related? I mentioned penicillin, but I wonder if there's anything else we could use that's similar. Syringes? For something related to disease?"
"It's our comparative advantage! If there's any way we can create more elaborate or specific metaphors using that stuff I bet that'd help. Wixen are a tiny minority of people, apparently completely isolated from the outside, and alchemists are a tiny minority of wixen, I wouldn't be surprised if very few people ever thought of using muggle stuff there, especially given that muggles only really got noticeably ahead this century."
"...yeah I think if weapons are used at all it'll be as something to symbolically sacrifice. Do any of those have obvious instances related to all this? Other than weapons and death. Nonmagical biology in general and diseases, I guess, but we've already mentioned that."
"But those little plastic models are really really wrong! ...does alchemy depend on our personal subjective position on the metaphor? Like, if I tried something that depended on a metaphor for an atom and was really really sure that that particular metaphor was bad, would it not work for me when it might work for someone else?"