View Single Post
Old 08-15-2002, 09:51 AM   #8
MaggieL
in the Hour of Scampering
 
Join Date: Jan 2001
Location: Jeffersonville PA (15 mi NW of Philadelphia)
Posts: 4,060
Re: 8/12/2002: Digital sundial

Quote:
Originally posted by Undertoad
And they don't mention whether it knows about daylight savings time. [/b]
I suspect it knows only about true solar time. Back in the 1960's Scientific Amarican's Amateur Scientist column published a description of a highly accurate sundial that could be adjusted to keep mean solar time, as a clock would.

But from the photo, it looks like you have to judge the relative brightness of the figures for the ten-minute intervals to read the time, probably with about two minute accuracy.
__________________
"Neither can his Mind be thought to be in Tune,whose words do jarre; nor his reason In frame, whose sentence is preposterous..."

MaggieL is offline   Reply With Quote