Stránka:roll 1910.djvu/130

114 BOY SCOUTS OF AMERICA angle to this. By a process of equal subdivision I got 45^, 22^**, finally 40°, which seemed to be the latitude of my camp; subse- quent looking-up showed it to be 41° 10'. Of course, it is hard to imagine that the boys will ever be so placed that it is important for them to take their latitude with home-made implements; but it is also hard to imagine circum- stances under which it would be necessary to know that the sun is 92,000,000 miles away. It is very sure, however, that a boy who has once done this has a larger idea of the world and its geography, and it is likely to help him in realizing that there is some meaning to the lines and figures on the border of his school-maps, and that they are not put there merely to add to his perplexities. SUNDIAL, OR HUNTER'S CLOCK To make a scout's sundial, prepare a smooth board about 15 inches across, with a circle divided into 24 equal parts, and a tem- porarily hinged pointer, whose upper edge is in the middle of the dial. Place on some dead level, solid post or stump in the open. At night fix the dial so that the 12 o'clock line points exactly to north, as determined by the Pole-star. Then, using two tem- porary sighting sticks of exactly the same height (so as to per- mit sighting clear above the edge of the board) set the pointer ex-