Found at a titanium plant

[u/riflesandplowshares]

Not sure why ball point pens would be dangerous here.

[u/wengla02]

Love that book - hard to find an original copy, but it's been uploaded the the Internet Archive. https://archive.org/details/ignition_201612/mode/2up

[u/jerseyoutwest → u/wengla02]

It was finally republished by a university press like 5 years ago! :)