Fourth Volume - New Description of the Sun Dial - Problems - Page 210 Fourth Volume - New Description of the Sun Dial - Brief Compendium - Page 211
Fourth Volume - New Description of the Sun Dial - Problems - Page 209



Fourth Volume - New Description of the Sun Dial - Problems - Page 210 Fourth Volume - New Description of the Sun Dial - Brief Compendium - Page 211 Fourth Volume - New Description of the Sun Dial - Brief Compendium - Page 212