It is arranged simply: two glass tubes with a length of about 100 mm, diameter of inner hole at least 10 mm, and two lines of hose with a length of about 600 mm each. Connect it all as shown in the figure, filling half colored water, kerosene, or glycerol. This level is always ready to work. So his testimony was true, the upper hose should not contain the fluid. N. BELOV, D. Imabari, Chuvashia
Recommend to read
SHAVEN GLASS…
How whereis when painting Windows, what precautions apply no glass will still stain. For cleaning everyone has their favorite method and device. Many use a razor blade. But few who...
Ultrasound against rodents
Among elastic oscillations of air, ultrasound (from Latin ultra — beyond, more, above), inaudible to the human ear and with a lower frequency limit conventionally taken as 20 kHz, has long...
