In addition to the hourglass, there are more structurally similar water. Their simplified version can be made and most. Enough to take two graduated bottles for baby food and to connect them with their necks in one tube, which is inserted two thin tubes, so that their opposite ends do not reach the bottom of the bottle. Time can be tracked for graduation or to apply a special scale by looking at the clock.
Recommend to read
HOLE? LEAD!
It is impossible not to admire the rapid slide on the water surface caught wind of the windsurfer, or at least a dizzying descent from the rampant ocean waves athlete on the other Board,...
“THE FIREBIRD” ON THE LEDS
A souvenir depicting fairy-tale "the Firebird" with the use of LEDs, can make even novice hams. The details of the electric circuit, except the LEDs are placed inside a plastic soap dish...
