[stonyloam]

Thanks Rick: It only took four tries to get it to post it in a readable form. You (and anyone else) may use the table as you wish.

As for thermometers, I use a Taylor instruments instant read digital cooking thermometer (bought at the grocery store for $10) whenever I need a local temperature reading (snow, water, even cooking). Digital readout, battery lasts a long time, 0.2 F precision and seems to be pretty accurate:
Glass of ice water…………...32.5 F
Body Temp oral ……………95.5 F
BT medical thermometer….....96.0 F (I tend to run a little cool)
It has a long probe so you can read down in the substrate and water temps. It is probably accurate enough to calibrate your other thermometers.

BTW did you know that a thermocline will form in a glass of unstirred ice water? 32 (0C) at the top and 40 (4C) at the bottom? Nice piece of semi useless information.