On my last trip to Germany this year, I collected the November issues, including 2 Christmas stamps: religious and nonreligious.
The Star of Bethlehem
This is a charity stamp.
A snowman in a snow globe.
300 Years of the Fahrenheit Scale
The Fahrenheit temperature scale was proposed by Daniel Gabriel Fahrenheit. I wonder if Deutsche Post has got this anniversary wrong. Fahrenheit proposed his temperature scale in 1724. In 1714 – 300 years ago – he invented the mercury thermometer.
Commemoration of Julius Robert von Mayer’s Birthday – 200 Years
Julius Robert von Mayer was a German physician who established the principle of the conservation of energy in 1842.
Energy can be neither created nor destroyed.