Porta, Giambattista della, 1535?-1615 · London : Printed for Thomas Young, and Samuel Speed, and are to be sold at the three Pigeons, and at the Angel in St. Paul's Church-yard · leaf 406
Dial is done, and it is the lafl Hour : But when you would have your Dial go again, you muff have a crooked empty pipe, O K, the upper mouth Kmuft be If opt with the finger K ; fo K being fiopt with the finger, that the air may not enter , link it under the water, that it may come within theveffel… … fwim on the top of the water, and that will fhew the Hours marked on the outfide of the veffel. Chap. V. lA defeription of Vejfels cajling forth water by reafon of Air . NOw I will deferibe fome Fountains, or Vcffels, that by reafon of air caff forth water : and though Heron ingenioufly deferibed…
Science -- Early works to 1800 · Magic · Alchemy · Industrial arts -- Early works to 1800
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