9. Map of Gibraltar. 10. The constellation of Scorpio. 11. The cap worn by the Doge of Genoa. 12. Drawing of the interior stairway of the Arsenale building, Genoa. 13, 14. Author's study on the light spectre of different types of lanterns. 15,16, 17. Instrument for the distillation of mercury which the author saw in Italy. Instruments of the type were widely used in 17th century alchemist circles.

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Devices and other objects used in scientific experiments.

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18. Astronomical instrument. 19, 20. Condensation vessels (to turn gas into solid matter)21. Instrument for making detailed drawings, used in architecture and astronomy. 22. Drawing of coal mine, showing the ventilation system.

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Instrument used in experiments on vacuum.

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49-59. Test tubes. 52. View of Hohentwiel castle at Singen, Germany.

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Tables and vials for the calculation of the relative density of liquids.

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