Confident fill the tank with a narrow neck to the desired level (for example, an automotive canister), if you equip the funnel with a special gauge. For its production will need a wire needle with a diameter of 1 mm, cork or foam float and a tin strip into the guide hole.
Recommend to read
MICROSCOPE FROM A DROP OF WATER
Probably unlikely pharmacist Leeuwenhoek invented the microscope, not whether it is a variety of lenses. In our time, for those who want to make a microscope, may be more difficult:...
“COAT” FOR BATTERIES
AA cells can be installed in a socket of larger diameter than itself, if you wrap it in several layers of paper, foam or any other available material suitable for this purpose. For...
