Fourth Volume - New Description of the Sun Dial - Chapters - Page 20 Fourth Volume - New Description of the Sun Dial - Chapters - Page 21
Fourth Volume - New Description of the Sun Dial - Chapters - Page 19



Fourth Volume - New Description of the Sun Dial - Chapters - Page 20 Fourth Volume - New Description of the Sun Dial - Chapters - Page 21 Fourth Volume - New Description of the Sun Dial - Chapters - Page 22