[MassiveDMG]

Since someone asked on Facebook whether or not I could scan in the instructions in the lid of the Beckman PH Meter, I stumbled upon 2 high resolution scans of the instructions. Just in case someone wants to restore their Beckman or use the style to make a Ghostbusters specific overlay to store in the lid, here are the links:

https://digital.sciencehistory.org/works/th83kz33c

https://digital.sciencehistory.org/works/hm50ts226