Page:Popular Science Monthly Volume 88.djvu/658

 630

close the valve automatically. Close the gas-cock, make the proper connections, and the apparatus is ready to use. As gas is consumed, the gasometer descends until it opens the valve. More carbide falls into the receptacle to generate fresh gas, thus raising the gasometer and clos- ing the valve again. When through with the light, turn off the gas-cock. This stops the generator. As the gas cannot escape, it remains in the same position until used again.

The gas is generated in the larger tank, rises to the smaller tank and lifts it. The weight of the gasometer pre- vents it from going too high and also gives the pressure to the gas. The gas cannot flow down and around and out through the spaces between tanks, since the quantity of water forms a perfect seal. — T. F. Buscii.

A Novel Window-Shelf

PROCURE from a blacksmith two %" iron rods about 16'' in length. Bend these in the center at a right angle. Then put eight ordinary screw-eyes — the eyes must be large enough to permit the rod to pass through — into the wall and into the under-side of the shelf- board as the illustration shows. With a pair of pliers open up the eyes of those in the wall, which is an easy matter. Now insert the rods and bend the eyes back over them. The shelf-board can now be slipped on the projecting ends of the rods, care being taken that they go through both 'the front and rear screw- eyes. Unless the screw-eyes are long enough to be driven into the scantling,

��Popular Science Morithly

���supporting upright strips for these will be necessary.

When it is desired to remove the shelf-board to facilitate sweeping, for instance, just pull it out and swing the ends of the rods back against the wall as if they were on hinges. They may even be removed if desired.

���The cream may be taken off the top of a

milk bottle with a syphon more rapidly

and effectively than with a spoon

A Siphon to Remove Cream from Bottles

AN easy and effective means of re- moving the cream from bottles of milk is shown in the illustration. The siphon is filled by inverting the short end in the neck of the bottle until the cream runs in ; the thumb is then held over the long end and the siphon placed in position. By adjusting the depth to which the short end reaches in the bot- tle, the entire amount of cream can be removed without withdrawing any milk. The siphon is easily cleaned by running hot water through it. An ordinary rub- ber tube will do.

��T

��A Wash-Wringer Attachment

O facilitate the

���Two views of a simple window-shelf which can be easily removed

��moving of the wringer to and from the w a s h - room, saw off one end of the bottom at right angles, drill a hole in it, and fasten on a caster. The caster should be one of the type which does not pivot about and should be so placed that it barely touches the floor when the wringer is upright. When it is desired to move the wringer, pull it back on the caster and push it ahead.

�� �