Trick to telling how much daylight is left in day

[Travis]

Someone just shared this on FB and it was too good not to share. Now to see if it really works!

 

[smritte]

Huh...cool.
I know when the sun is about there on the horizon, I need to find camp soon. I will defiantly try this.
BTW, this looks like one of the hand drawn sections from a 1950's Boy scout book. Except the guy has a trimmed beard and a modern backpack.