The figures, for anyone assembling their own picture. Practical: whatever you change, write down the date and the reason. In three months the reason is what you will have forgotten, and the reason is what makes the record worth having.
One thing that is still open after Dr.ObesityLA’s answer:
Was that from a primary source or from a summary of one?
raj_cambridge said:Practical: whatever you change, write down the date and the reason.
I am going to disagree with the direction of travel here. The thread has converged on the tidiest answer rather than the best-supported one, and those are not the same thing.
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Shop Reference Standardsraj_cambridge said:Practical: whatever you change, write down the date and the reason.
Right, and the exception is worth naming rather than left implied, because the exception is where people get into trouble.
Closing the loop on my own question.
Update: the excursion was survivable and the vial was fine. I now keep a cheap fridge thermometer, which costs nothing and ends the argument.