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They refer to the time - in hours. The slanted edge of the gnomon casts a shadow on the sundial at the position which represents the time.
Because they want to and it's a free country.
The only specialized word I can think of for the difference between two squares is "gnomon", and it's called that because it sort of looks like one (a gnomon is the word for the "pointer" part of a sundial).
formula for calculating through-feed grinding time
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It doesn't. The gnomon is supposed to match the latitude of the location where the sundial is placed. If the latitude is 30 degrees and the gnomon is 45 the entire sundial will have to be tilted to keep correct time. Another way to describe this is to say that the gnomon should be parallel to the Earth's axis.
Gnomon
A gnomon is the upright piece of a sundial, and it is the part that casts its shadow down onto the dial to indicate local solar time.
The answer is gnomon
The web address of the Gnomon Productions is: http://anamericanasaga.com
The gnomon is the physical component of a sundial that casts a shadow onto the graduated scale for the purpose of timekeeping.
The phone number of the Gnomon Productions is: 415-956-7030.
gnomon
The gnomon must be facing north and the base must be level
The cast of Gnomon - 2002 includes: Aina Clotet Pedro Herreros Santi Sans
They refer to the time - in hours. The slanted edge of the gnomon casts a shadow on the sundial at the position which represents the time.
The suns angle creates a colored diffraction line directly on the CD, that is, there is no shadow created so you do not need a gnomon.