Popular Scie7ice Monthlij 



407 



A Metal Bottle-Cover That Never 

 Wears Out 



A METAL bottle-cover to take the 

 place of the unsanitary paper cover 

 has been devised by Harry \V. Spangler, 

 of AUentown, Pa. 

 It may be used over 

 and over again on 

 any number of bot- 

 tles. It fits around 

 the neck of the bottle 

 like the paper cover, 

 but instead of being 

 pried off, it is turned 

 from right to left by 

 means of a knife, 

 held in the hand of 

 the operator. 



The knife is placed 

 between three pro- 

 jecting points on the 

 surface of the cover, 

 these points forming 

 a kind of groove. 

 The cover may be 

 used on fruit jars as 

 well as on milk bot- 

 tles or other glass con- 

 tainers, which need 

 such a protection. 



To remove the cover, a knife is 

 placed between the points and turned 



This New Self-Loading Wagon Makes 

 Road Grading Easy 



THE new device shown in the accom- 

 panying illustration, is designed to 



load and unload road-grading dirt three 

 times as fast as any other similar type of 

 machine. It consists of a light four- 

 wheeled trailer, with a body pivoted about 

 the rear axle. The bottom of the body is 

 an endless belt, automatically driven as 

 the trailer is pulled 

 along by either a 

 four-horse team or a 

 light tractor. 



The body is low- 

 ered at the front end 

 to the desired angle 

 by means of a worm 

 gearing under the 

 control of the opera- 

 tor on the trailer, 

 who also controls a 

 cutting edge much 

 like that of a plow- 

 share, located in 

 front of the forward 

 end of the conveyer 

 belt. This cutting 

 edge scrapes up the 

 dirt and throws it 

 back on to the for- 

 ward part of the end- 

 less belt which car- 

 ries it to the rear of 

 the body and piles it 

 up to the proper 

 height until the entire body is loaded. 



When this is done, the front end of the 

 body is elevated to clear the ground. 

 Then the trailer is hauled to the dump- 

 ing place. 



Body-raising and 

 lovvenno v/orm-shafts 



Hinged 



tail-gat^ 



By tipping the body of the trailer to the rear, the load may be dumped 

 all in one place or spread out in a thin layer by means of a hinged tail-gate 



