Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 20 Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 21
Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 19



Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 20 Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 21 Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 22