Hello Claude!
Since I am a lover of books, I have tried to gather, or at least to know, all the books on Sundials that are available currently in Italian (my language), in English, in French and in Spanish. Among them those that deal the study of the sundials not using mathematics as secondary technique, are very little (I know only 5) : I list them below with some personal notes. In English Harold E. Brandmaier - SUNDIAL DESIGN in photocopies - April 2003 - $25 - p. 160 - UNIA4 - 118 graphs and sketches in the text - any photo The only text present in the english literature (to my knowledge) that broaches the study of the sundials from a theoretical-mathematical point of view and the only one that uses the matrix calculation. The volume requires a preventive knowledge of the solar clocks and of their construction. The text is very clear, synthetic, well explained and full of annotations and idea. In Italian - Fantoni Girolamo Orologi Solari - Trattato completo di gnomonica Rome 1988 - p. 550 UNI 4 - Bound - About 66 Euro In my opinion the best theoretical book currently in commerce in the world. It deals of almost all the types of solar clocks (ancient and modern) Enough technical. Complete. A lot of sketches and photos - Ferrari Gianni - Relazioni e formule per lo studio delle meridiane piane 1998 - p. 250 UNIA4 - 42 Euro + shipping - published in photocopies Mathematical study of plane sundials -Very technical. It contains some arguments not dealt in any available text currently in the world - more than 200 sketches and original graphs (my book : -) ) In Spanish - Gaya, Rafael Soler - Diseno y construccion de Relojes de Sol - Metodos graficos y analiticos Mayorca - 1997 - p. 450 UNIA5 bound Colegio de Ingenieros de caminos, canales y puertos - Carrer Convent de Sant Francese 10-1er - 07001 Ciutats de Mallorca - Spain One of the best theoretical texts currently in commerce in the world. Enough technical. Complete. A lot of sketches, graphics, photos in b/w and in colours, mottoes. In French -Savoie Denis - La gnomonique Le Belleses Lettres - Paris - 2001 - p. 450 bound Very technical and complete. It contains arguments - as the quadrants in stereographic projection - that are not currently treated in any other available text - Numerous sketches and original graphs. One of my preferred books is Rene Rohr - Sundials - Dover even if the Italian edition (now out of print) it is more wide and with more arguments. In any case, in my opinion, the books reminded are not suitable for those who begin the study of the sundials, as the Waugh and of the Mayalls are, and they can be read with profit only after a good personal knowledge of the matter. A dear regard Gianni Ferrari 44° 39' N 10° 55' E Mailto : [EMAIL PROTECTED] -
