PF Photo Contest - What Is It? (11/3-11/9)

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  • #27
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My immediate guess is a stone with a hole for a candle.
It's less a "what is" than a "how come". I would have made a joke by taking the other side of the stone as a rebus (Ein-Stein or One-In-Hole) and this one as part of the solution, but it might have disqualified me for double counted pictures. I like this stone for the physics behind it.
 
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  • #28
Janus
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WHTST.png

Emergency fire starter. The main body is made of magnesium and the inset cylinder is a flint. You use a knife to shave some magnesium filings onto your tinder, then strike it across the flint, producing sparks which ignite the filings.
 

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  • #33
OmCheeto
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Looks suspiciously similar to something I also made, in shop class, ≈40 years ago.

2018.11.09.shop.class.png


ps. I've made some "mods", over the years.
pps. Pardon the dust. It's been "repurposed"
ppps. Praying the voters in this contest are all under 30.
 

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  • #34
kuruman
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ppps. Praying the voters in this contest are all under 30.
It's a bong from the sixties !! :partytime::partytime:
 
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  • #35
jim hardy
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well here's one i took of an old car repair.

housing&gasket2smaller.jpg


Ford Escort engine water outlet & gasket
Top one: They ALL leak around the o-ring that fits in that groove around the opening .
Bottom one: I filled the groove with epoxy and sanded the surface flat, cut an old fashioned Felpro paper gasket .
Doing fine for several years now..

old jim
 

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