A HOME-MADE CLINOMETER. 



It may happen that the forester located in some rough section of 

 the country will wish to lay out a trail or road on a uniform grade. 

 Should his kit lack a regular instrument, the following device will 

 prove adequate for all practical purposes. 



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X.Y is a piece of board, preferably pine, one-half ineh thick. 

 For convenience it should be cut 12" x 4". On the upper edge are 

 two light staples or screw eyes, equally distant from either end. A 

 hard cord, ach, is carefully knotted at c, so that gc=c6. A large 

 knot also is tied in the cord at d. In the center of the lower edge of 

 the board, a plumb-bob, P, is attached at h. The points, e, f, g, h, i, 

 and j, represent ordinary pins, driven perpendicularly into the wood, 

 with about one-quarter inch remaining above the surface. The dis- 

 tance of e to /" is ten inches. Along the lines ei and fj pins may 

 be placed at any desired distances. In the illustration, the pins are 

 placed one inch apart, so that in each case eg, gi, fh, and hj equal 

 one inch. 



