Popular Scietice Mouthhj 



^^l\i 



known, and it consumes very little of the 

 power passing through it. The ball bear- 

 ing is divided into several classes. There 

 is the annular ball bearing, which has 

 races in the form of rings, and there is also 

 the bearing which has a holder or race 

 "L" shape, with curved sides facing the 

 balls. This is known as the cup and cone 



Connecting rod end with a split babbitted 

 bearing that can be readily replaced 



bearing, and these are adjustable, while 

 the annular bearings are not. This type 

 of bearing is also classified according to 

 the way in which it carries its load, as 

 thrust or radial. Ball bearings are built 

 which withstand both radial and thrust 

 load. Then again, bearings of this char- 

 acter are built which have two rows of 

 balls. To work properly these balls 

 must not vary in size more than one ten- 

 thousandth of an inch. If one ball is 

 worn through under-lubrication all of the 

 balls of the set should be replaced with 

 new ones. While oil is used to lubricate 

 the plain bearing, medium weight cup 

 grease should be used for the ball and 

 roller bearings, and the best grade of 

 grease is none too good. 



Every time the bearing is removed from 

 the car it should be washed thoroughly in 

 kerosene and dried on a clean, dry rag. 

 The bearing should be kept free from 

 water, dirt, grit, or other foreign sub- 

 stance, any of which might be sufficient 

 to ruin the entire bearing assembly. Be- 

 fore replacing the bearing, after it is 

 washed, fill it with new, clean grease. 

 Caution should be exercised in tightening 

 the bearing in its housing. See that the 

 nuts are turned down evenly so as not to 

 cramp the bearing in any way. The 

 operator should never hurry in replacing 

 the bearing. He should see that every 

 step in the work is done right before 

 proceeding. 



Strengthening Hammer Handles 

 with Steel Strips 



A'^LAW hammer of the usual kind 

 with a wood handle may be made 

 very strong for heavy work, such as 

 pulling very large nails. This can be done 

 by sawing out an opening in the handle 

 from the hammer head back past the 

 center of the handle an inch or two and 

 inserting a strip of very narrow old .steel 

 buggy tire and securing in place by drill- 

 ing small holes through both handle and 

 buggy tire strip. The proper place for 

 the holes is just back of the hammer head, 

 one in the center, and one just back of the 

 center an inch or two from the end of the 

 buggy tire strip. Sometimes the drilling 

 may be dispensed with by selecting a strip 

 of buggy tire with bolt holes in the proper 

 places. 



A Wall Hanger for the Ordinary 

 Electric Lamp Stand 



THE illustration shows a sim.ple de- 

 vice for using an adjustable elec- 

 tric stand lamp as 

 a wall lamp at the 

 head of bed or 

 couch. The de- 

 vice consists of 

 three strips of 

 wood screwed to 

 the wall in the 

 shape of a half 

 hexagon and three 

 narrower strips 

 nailed on to them 

 so as to extend 

 over the inner edge, 

 forming a groove 



The desk lamp as 

 it hangs on the wall 



into which the base of the lamp can be 

 inserted and held firmly. Being ad- 

 justable, the lamp affords a reading light 

 at whatever angle the person reclining 

 on the couch desires. — F. L. Clark. 



An Inexpensive and Effective 

 Aluminum Polish 



THE following is a fine polish for 

 aluminum ware. It is made by 

 mixing ammonia and water in equal 

 quantities, and then adding the mixture 

 to sufficient borax to make a paste about 

 as thick as paint. Apply with a thick 

 soft cloth and polish with canton flannel. 



