Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 50 Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 51
Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 49



Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 50 Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 51 Fourth Volume - Construction and Use of the Sun Dial - Contents - Page 52