>Far better to trust the laws of physics, and go with a mechanical scale

As much as I enjoy a number of electronic devices (I haven't used my slide
rule in years), I also trust mechanical scales more so than cheap digital.
I use my old triple beam balance all the time, including for measuring
oxalic.  Be sure to use plastic weigh boats (or a plastic cup) to avoid
getting acid on the balance.

-- 
Randy Oliver
Grass Valley, CA
www.ScientificBeekeeping.com

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