224 



A Sled Brake Which Will Not 

 Throw You Headlong Into the Snow 



SLED brakes seldom work satisfactor- 

 ily. When applied, they either cause 

 the occupant of the sled 

 to plunge headlong into 

 the snow or force the 

 sled to spin around like 

 a top. A brake recently 

 invented by Jacob Blas- 

 zczyk, of Chippewa 

 Falls, Wisconsin, over- 

 comes these defects in a 

 simple way. 



The brake is not 

 mounted on the side of 

 the sled, as are most 



Popular Science Monthly - 



To operate the brake, a handle which moves between 

 wooden guides is pushed forward on anti-friction rollers 



boy-made brakes, but is rigidly attached 

 to the underside of the sled top. The 

 brake end consists of a toothed steel 

 plate, which is made fast, by means of a 

 rod and strong spring, to a handle at the 

 front of the sled. To operate the brake, 

 the handle is pushed forward on 

 anti-friction rollers which travel 

 between wooden guides. This is 

 done with the rider's feet, as he sits 

 upright on the sled. 



How Many Mot ion -Picture Tree-Top 

 "Close Ups" Are Taken 



WHENEVER you are puzzled by the 

 unusual in motion pictures, there 

 are always' two points 

 to be kept in mind. 

 The scenes are not taken 

 in the order in which 

 they appear on the 

 screen, and continuity 

 of thought takes the 

 place of continuity in 

 fact. 



For instance, if you 

 see a girl start to climb 

 a tree and an instant 

 later see her in the top- 

 most branches, the 

 thought is practically 

 continuous and your 

 mind imagines the rest 

 of the climb. The ac- 

 companying photograph 

 shows how such a pic- 

 ture v/as actually filmed. All of the scenes 

 on the ground, before and after the 

 heroine was supposed to have climbed 

 the tree, were taken first. Then strips of 

 planking were nailed to the tree and the 

 tree-top "close ups" were taken. 



Cook a Breakfast for Six for 

 One-fourth of a Cent 



'"p^O-DAY the question of fuel is 

 J. a burning one, metaphorically 

 as well as literally. In a series of 

 very interesting tests recently con- 

 ducted at the Ohio State University, 

 natural gas was found to be the 

 cheapest combustible. There are 

 many places, however, where it 

 is not available. 



A breakfast which cost one- 

 fourth of a cent to cook with 

 natural gas, cost nearly three and 

 one-half cents to cook with soft 

 coal, two and one-half cents with 

 coal oil, over three cents with 

 gasoline and three cents exactly 

 with electricity. 



The camera platform is mounted on a motor 

 truck. Ground props prevent all vibration 



