Dear Jim, I would like to explore the issue of mmHg as a dangerous unit a little further.
Let me quote from my original message: 'Because the medical profession is using mmHg for blood pressure it must feel right to actually use mercury in a glass tube to measure it.' This raises two questions: Is the sphygmomanometer that your wife uses a mercury-in-glass device? If you wanted to place a mercury-in-glass manometer in each of your laboratories, and in each of your offices, what would be the reaction of the occupational health and safety people at your university? Cheers, Pat Naughtin CAMS Geelong, Australia
