leonardo da vinci : the codex leicester

how can one determine the volume of evaporated water?

a sack made of animal skin is placed in a box. half the bag is filled with water and sealed so that a bubble forms, which is half filled with water and half vacuum. cover the box by laying a board on it. to this board fix a rope that runs over a winch and on whose end a weight is anchored. because of this ballast weight the covering board becomes so light that it can be raised aloft as soon as one heats the box and the water in the bubble evaporates and expands. as the covering board rises one can see how the water expands when it is evaporated.






  1. does the earth have a circulatory system of water?
  2. can it be proven that the interior of the earth is permeated with underground streams?
  3. how does a river start on top of a mountain?
  4. why doesn't water cover the entire earth?
  5. did water originally come from the earth's interior?
  6. why does water flow upwards if it is blocked directly at the source?
  7. why doesn't evaporated water rise?
  8. why does more water flow out of an underground stream than from a higher region?
  9. how does water behave in a container when someone knocks the container?
  10. how can one dispel the error that claims the sea level is higher than the highest mountain?
  11. how can one determine the weight of a ball in parts?
  12. does the length of a pipe influence the speed of the flow through it?
  13. how can one determine the volume of evaporated water?
  14. why does smoke change its speed when ascending?
  15. ändert sich das wassergewicht, je nachdem, wie man eine wassergefüllte rohre neigt?
  16. how does a water bubble seal itself?
  17. why is the sky blue?
  18. how does air thicken?

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