Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 40 Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 41
Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 39



Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 40 Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 41 Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 42