Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 18 Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 19
Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 17



Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 18 Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 19 Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 20