Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 52 Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 53
Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 51



Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 52 Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 53 Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 54