Eccentric Old Guy
Senior Member
Notice the number of gallons is in reverse order so you can measure the gallons from a full glass downward to the remaining gas when the car is full.
I missed that, and it's a significant observation, GB.......good catch!
So, it would seem that when a customer drives up, he can either say "fill it up" or "give me five gallons".....(or any specific number of gallons).
If he wants five gallons, the attendant will pump five gallons into the glass globe, and give him all of it.
If he wants to fill up, the attendant will fill the glass globe to the top, and then subtract what's left to determine how much it took to fill up. The indicator tabs eliminate the need for any math calculations in that determination.
So, how does the transaction proceed if the customer asks for a buck fifty's worth.....or, six bits worth....????
As Ursus said: His grandpa would avoid stations that didn't have shade, which leads one to believe it was common to have gas in the glass globe left over from a previous sale. The photo in this thread suggests this, too!
eog
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