The text was the first report of the practical resistance to compression - which Magiotti mistakenly claimed to be absolute - of water at constant temperature, as well as the expansion and contraction of fluid media (water and air) subjected to changes in temperature.
O texto foi o primeiro informe da resistencia á compresión práctica —que Magiotti afirmou de xeito erróneo que era absoluta— de auga a temperatura constante, así como a expansión e contracción dos medios de comunicación de fluído (auga e aire) ó sufrir cambios de temperatura.