In 1612, Caus published a work entitled: “Perspective with the reason of shadows and mirrors” (“La Perspective avec la raison des ombres et Miroirs”), which he dedicated to the prince.
In 1614 to 1626, Caus worked as a hydraulic engineer and architect under Louis XIII and also in Germany, where he built a water-driven organ, a water-driven singing and flapping bird automaton
, among other devices. (Ѻ
In 1615, Caus, in his The Reason for Moving Forces
, stated that there, historically, have been five main methods of elevating water above its level, which he recounts as follows: 
Caus, in respect to method #3, says that there are many types of devices, and gives the following device as an example, which is similar to that made or diagrammed by Giovanni Porta
The operation is such that globe a
is filled with water, which has a valve b
attached, for adding water, and a tube c
soldered into the upper part of the bulb, with a valve, the operation of which being such that, when fire is put under the globe, water shoots out of the tube c, like a fountain. In this work, Caus declared, supposedly, that steam, unique for this period of history, is evaporated water, and that upon cooling the vapor returns to its original condition.