Dear All, Much has been made of the difficulties in exactly determining where north is in order to set up a sundial. However, there are designs where this is not relevant. If a horizontal dial and analematic dial are correctly delineated on the same dial plate, this plate needs only to be turned until both dials tell the same time (with suitable allowance for EoT etc.). As a by-product, the resulting alignment will give you true north! Admittedly the accuracy will be heavily dependent on how well the dials are made and adjusted for time of year etc., but this way you need neither compass nor clock.
David Higgon London
