Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 42 Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 43
Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 41



Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 42 Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 43 Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 44