re: #945 swamprat

Mercury thermometers vs alcohol thermometers.

Mercury won’t read below 20 below.

Yes, and some were in Fahrenheit, not Celsius, and measured to full degrees, not tenth of a degree.

And again, there were some temperature reading as far back as 1691 in England, but that is regional, the accepted quasi-global record starts about 1850, and even that is quasi. There are many that dispute if we are able to measure an accurate global temperature today because of the chaotic nature of the weather.