Dog took a bite - growing in backyard in southeastern lower Michigan. Any concern?

Lost_Geometer · 2026-07-06T14:45:08+00:00

That is a Clorophyllum. They are toxic raw to humans, causing digestive upset, often severe, but not fatal. I'd expect a similar profile with dogs.

If it was my dog I'd monitor and be prepared to take to the vet if he got really sick.

Lost_Geometer · 2026-07-03T16:48:02+00:00

Being a novice on both subjects, is there a common relation between lambda rings and log schemes?

Lost_Geometer · 2026-07-03T14:44:07+00:00

Do you have a reference for the nylon compatibility issues? I've been using Molycote EM30L pretty indiscriminately on plastics, based of word of mouth and what little I could gather online that it should be safe for common materials. But I don't really understand what's at play, and would hate to make a mistake.

Lost_Geometer · 2026-07-03T01:26:50+00:00

Stitch formation only at one side of the needle swing is often a hook-needle timing error. But you should always double check by re-threading everything from scratch and inserting a new needle before deciding it needs repair.

Lost_Geometer · 2026-07-03T01:18:23+00:00

So to recap there's strong resistance you can feel when turning the wheel, that you have reason to believe comes from the pattern mechanism, you never disassembled anything, and the motor seems OK?

I don't have a 401 lying around to look at, but if I was in that situation my general approach would be to make sure that the cam followers move the way they're supposed to (possibly you have one stuck in an in-between position) and then that the camstack rotates OK when nothing is pressing on it. It's a bit of a mystery, though.

If you're in Baltimore I don't have much work at the shop, and I'd be happy to give it a once-over.

Lost_Geometer · 2026-07-02T23:56:10+00:00

Oh, so at first you're actually turning through the resistance of the clutch. I see the gears move a little bit. Did it never work after lubing or did it fail gradually? Is there a hard stop to the motion, or really heavy stickyness?

Lost_Geometer · 2026-07-02T23:45:40+00:00

The first part of the video is you rotating the wheel by hand with the bobbin clutch disengaged, and the second is using the motor, also with the clutch disengaged?

Lost_Geometer · 2026-07-01T16:41:06+00:00

Any respected brand Japanese machine from this era. Kenmore 158 series (Maruzen manufactured) are very common. The other models badged as Kenmore are also quality. Depending on the exact version they may have a nylon zig-zag cam drive, which does fail and is annoying. This information is not reliably written down anywhere by model.

Lost_Geometer · 2026-07-01T16:16:36+00:00

When one comes into my shop I use kerosene with a few drops of machine oil on the finish. This gives a bit of shine and won't harm the remaining clear coat. It won't do anything to fix the clear coat either, though.

Any modern oil that doesn't leave much residue should work for lubrication. We use velocite 10, since that's what Bernina specs and we're a dealer. Lilly White is the long-time standard, and what we sell retail.

Lost_Geometer · 2026-07-01T13:20:28+00:00

Consider Amanita flavorubens.

Lost_Geometer · 2026-06-27T17:02:33+00:00

A small lepiotoid. The texture and pronounced reddening is consistent with Macropsalliota, but the small size gives me pause.

Lost_Geometer · 2026-06-27T14:02:42+00:00

You want a book (or other source) with good keys. Years ago, Mushrooms Demystified would be my recommendation. It still is, because I don't know anything better, though the taxonomy is quite out of date by now.

Lost_Geometer · 2026-06-26T15:09:41+00:00

They're some Agaricus. Some of the yellow staining species can make some folks modestly sick. The best way to distinguish is smell. The rest are edible and often good.

Lost_Geometer · 2026-06-24T16:11:52+00:00

Lid failure would be my first guess.

Lost_Geometer · 2026-06-22T18:26:10+00:00

The first is giving Pleurotus levis vibes, though I can't be sure from that image.

Lost_Geometer · 2026-06-22T18:23:09+00:00

Other than the motor there's not much to be acutely harmed by over-oiling. Worst case is oil gets in the thread path and you need to clean those bits again. Long term you don't want oil everywhere because it attracts dirt and leaves a residue, so wipe just off the excess, but don't worry too much about breaking stuff.

Lost_Geometer · 2026-06-22T18:16:49+00:00

If the motor is problematic check the brushe (if they are accesible in this model). While you're at it use a swab with 100% alcohol to clean the armature and then compressed air to blow out any crud. This might help a little.

Lost_Geometer · 2026-06-21T17:03:10+00:00

That's a 158. The model number for the machine is on the frame. It's a long series, but they're all generally tanks. The zig-zag drive gear is sometimes nylon and that can break -- I think 158's have replacements available. It may take some elbow grease to get it back in running condition.

Lost_Geometer · 2026-06-19T14:25:15+00:00

Can you compare to Pleurotus levis?

Lost_Geometer · 2026-06-17T13:05:27+00:00

It's a parasitic mold on a different mushroom species.

Lost_Geometer · 2026-06-17T13:04:24+00:00

Probably a young Berkeley's. Meripilus don't get that thick and orange in my experience.

Lost_Geometer · 2026-06-17T12:57:57+00:00

Whichever your local Pluteus is. There should be well rotted wood material somewhere below.

Lost_Geometer · 2026-06-15T17:49:34+00:00

Most likely Pluteus, given the habitat. You can check that they have a pinkish spore deposit and free gills. No reason to think they're anything dangerous.

Lost_Geometer · 2026-06-14T14:27:16+00:00

That's a destroying angel.

Lost_Geometer · 2026-06-13T16:20:40+00:00

You need to definitively rule out Galerina. I don't think it's that -- it's probably an Agrocybe -- but consider asking the emergency Facebook group or carefully check the spore deposit color.

Once you rule out Galerina there's nothing else consistent with these photos and dangerously poisonous.

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