From Fer's recent message:
>> In my program Spin you may choose between inner circle as january or as
july.
>>This overcomes a litlle the problem of the gnomon length.
From readme2.doc Zonwvlak:SPIN    .EXE : calculates a horizontal azimutal sundial and writes thepoints to a file <name.RLT>. This file can be drawn on the screen withthe program SCRPLT.EXE.The months of the date-scale are in circles. The outmost circle can bejanuary first or july first.The program works for latitudes between 25 and 66.5 degrees and between
-25 and -66.5 degrees.
Now which is it, innermost, or outermost?
Sarah Edmondson-Jones

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