12. Whether it be possible to make man, and some other Animal Creatures, flye as Birds do?13. Of Snails and Leeches, and whether all Animals haue Blood?14. Of Natural Productions.15. Of the Seeds of Vegetables.16. Of the Providence of Nature; and some Opinions concerning Motion.17. Des Cartes Opinion of Motion Examined.18. Of the blackness of a Charcoal, and of Light.19. Of the Pores of a Charcoal, and of Emptiness.20. Of Colours.21. Whether an Idea haue a Colour, and of the Idea of of a Spirit?22. Of Wood petrified.23. Of the Nature of Water.24. Of Salt, and of Sea or Salt-water.25. Of the motions of Heat and Cold.26. Of the Measures, Degrees, and different sorts of Heat and Cold.27. Of Congelation or Freezing.28. Of Thawing, or dissolving of frozen Bodies.29. Several Questions resolved concerning Cold and Fro∣zen Bodies.30. Of Contraction and Dilation.31. Of the Parts of Nature, and of Atomes.32. Of the Celestial parts of this World, and whether they be alterable?0