Thermometers

We have to check our thermometers regularly, and today it was the turn of the two yellow "lollipop" thermometers to be checked.  The white thermometer, which still has a current maker's calibration certificate, is there to give the reference temperature.  They only have to agree to within plus or minus one degree, so both the yellow ones passed the test.

(The test photos were the only ones I took today.)