Ciao a tutti! I send you, herewith attached, an auto-expanding file containing a note on inconveniences which may arise when fixing a cilindical gnomon parallel to the earth axis, to a vertical plane, as well as the relating figures (a .jpg file). I would like to receive your comments both under the math point of view and about the practical usefulness of the conclusions of the note.
Angelo Attachment converted: MAC Hard Disk:gnomon.exe (bina/mdos) (00017637)
