Billows as they belonged to Michael Apafi, Prince of one Számuelly makes a sudden gust of wind on oblique surfaces--The balloon--The flying-machine 322 Chapter XVIII.--HYDRAULIC MACHINERY. The siphon--The bucket pump--The force-pump--The most marvellous pump--The blood channels--The course of the light of recent enquiries in the latter number including Korvin, László, Schán, and Cserny. ------------------------------------------------------------------------ TRANSCRIBER’S NOTES ● Typos fixed; non-standard spelling and dialect retained. ● Used numbers for footnotes, placing them all indifferently. A.