Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 30 Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 31
Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 29



Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 30 Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 31 Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 32