Popular Science Monthly 



equal parts of 30 deg. each. Two of them 

 added together give an angle of 60 deg. 

 The other one is divided into three equal 

 parts of 10 deg. each, two of which added 

 together give an angle of 20 deg. 



The circle, Fig. 8, shows how tee-joint 



Dividing a circle into degrees to obtain the 

 right angle in drafting an elbow, pattern 



angles may be laid out quickly by this 

 method. Just suppose that a tee-joint of 

 50 deg. is required. Draw the circle and 

 divide it into four quarters, each of which 

 will be 90 deg. Take one of these quarters 

 and divide it into three equal parts. These 

 will be 30 deg. each. Take the middle one 

 of these and divide it into three equal parts 

 of 10-deg. each. If a 30-deg. angle is added 

 to two 10-deg. angles you will have a 50-deg. 

 angle, which is the angle desired. Draw 

 tne front view of the tee-joint on the 50-deg. 

 lines as shown in the drawing. 



A Garden Hose Used as a Form 

 for Cement Pipe 



A FARMER wanting to construct" a 

 cement pipe to conduct water from a 

 spring into the house and barn, dug a 

 suitable ditch, poured in part of the con- 

 crete, and placed a hundred feet of garden 

 hose in the center, filling up the ditch. 

 Before the hose was placed in the ditch it 

 was filled full of water with a force pump. 

 When the cement set, the water was allowed 

 to run from the hose. Then the hose was 

 easily pulled out and used for the next 

 hundred feet. — F. E. Brimmer. 



941 



Repairing a Scratch on the Varnish 

 of an Automobile 



IF the scratch has gone no deeper than the 

 finishing coat of color, take a fine thin 

 striper or pencil, and draw a fine line the 

 entire length of the scratch, endeavoring to 

 fill the depression, but not running over the 

 edges. 



The varnish should be thinned with tur- 

 pentine so that it will give a smooth sur- 

 face and dry rapidly. 



If you don't happen to fill the scratch, it 

 will be all right as long as you get it glossed 

 over. To be sure, the line may show on 

 close examination, but from a short distance 

 it will be invisible. — James M. Kane. 



Eliminating Noise from Shift Levers 

 On an Automobile 



A CAR that had developed a case of 

 noisy shifting levers for both change 

 speed gears and the brake was recently 

 brought into our garage. An examination 

 revealed the cause of the trouble to be the 

 bushing of the lever hubs against the gear 

 case when the gears were being shifted or 

 the emergency brake applied. We in- 

 serted a comparatively light helical spring 

 beside the hubs of both levers. These 

 springs served a twofold purpose. They 

 helped to minimize the shock when shifting, 

 and prevented the lever hubs from touching 

 the case, thus entirely eliminating the 

 noise. 



When employing a remedy of this kind, 

 care should be taken to make the springs of 

 wire that will not cause trouble in shifting, 



BRAKE 

 LEVER 



Coil springs inserted between the shift 

 levers to take up wear and prevent noise 



and to see that the springs when compressed 

 do not occupy too much space; otherwise 

 the amount of travel allowed for the shifting 

 may be decreased to such an extent as to 

 prevent proper shifting. — Adolph Klein. 



