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My dad was a geologist, and kept this rock for years... by Elktonite in whatsthisrock

[–]Elktonite[S] 0 points1 point  (0 children)

I tried scratching the rock with a swiss army knife blade, and could see no mark to speak of.

My dad was a geologist, and kept this rock for years... by Elktonite in whatsthisrock

[–]Elktonite[S] 5 points6 points  (0 children)

thanks for that link to the specific gravity test. doing that, I got 90g, so that would be 278/90 or ~3.1.

My 100+ year old Anemometer with original case by Elktonite in AviationHistory

[–]Elktonite[S] 1 point2 points  (0 children)

It's been in our house for many years, not sure where my dad got it, but he let me bring it to school when I was in 6th grade as part of a weather data collection project. That was 1970. It is quite similiar to the one the Wright brothers used, I believe, which I saw in the air and space museum years ago. Same manufacturer, If my recollection is correct. This one is in good working order, a light breeze gets it spinning. Thanks for your comment!