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
�� �
