2l6 



The Book of Woodcraft 



A HOME-MADE COMPASS 



If you happen to have a magnet, it is easy to make a 

 compass. Rub a fine needle on the magnet; then on the 

 side of your nose. Then lay it gently on the surface of a 

 cup full of water. The needle will float and point north. 



The cup must not be of metal. 



AN INDIAN CLOCK, SHADOW CLOCK OR SUNDIAL 



To make an Indian shadow clock or sundial, prepare 



a smooth board about fifteen inches across, with a circle 



^______^___^__^_^^^__^ divided by twenty-four 



~. I*. ] ^ rays into equal parts. 



Place it on a level, solid 

 post or stump in the 

 open. At night set the 

 dial so that the twelve 

 o'clock line points ex- 

 actly north, as deter- 

 mined by the Pole Star 

 and nail it down. Then, 

 fix a stick or pointer 

 with its upper edge on 

 the centre and set it 

 exactly pointing to the 

 Pole Star (a b) ; that is, 

 the same angle as the 

 latitude of the place, 

 and fix it there immov- 

 ably; it may be necessary to cut a notch (c) in the board 

 to permit of a sight line. The hours eight at night to four 

 next morning may as well be painted black. As a time- 

 piece, this shadow clock will be found roughly correct. 



