Natural magick in twenty books : wherein are set forth all the riches and delights of the natural sciences (1658)
Della Porta, Giambattista, Giambattista, Della Porta · Th. Young and S. Speed · leaf 403
, and it is the last Hour : But when you would have your Dial go again , you must have a crooked empty pipe , O L , the upper mouth K must be stopt with the finger K ; so K being slept with the finger , that the air may not enter , sink it under the water , that it may come within the vessel AB :… … swim on the top of the water , and that will thew the Hours marked on tbe outside of the vessel . Chap . V . tAdescription of Vessels casting forth water bj reason osAir . N OW I will describe some Fountains , or Vessels , that by reason of air castforth water : and though Heron ingeniously…
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