Mac / List I must of missed the part of the perpendicular gnomon. Two other suggestions though.
One, Have the needle extend through the ball and use that as the pointer. Two, Cut deep spherical grooves around the ball perpendicular to each other (North,South and East West). I'm fresh out of ideas now. Henry On 03/28/97 06:53:12 you wrote: > >>Mac / List >> >>How about drilling a hole in the center of the ball then the light shining >>through would indicate the center >>and should be very visible. >> >>Regards, >>Henry > > >Well, with a perpendicular needle gnomon terminating at a ball, at what >angle and in what direction would one drill the hole? > >Mac > > > >
