Diagnostica 4 was built in the Museo de Bellas Artes "Castagnino" in Rosario City, Argentine, during the 3^rd biennal of the critic in 2000.

Several test tubes full with water were settled. Each of them let the dripping over a hot plate that evaporates the drops that fall on them inmediately.
The drops are made up very slowly in each test tube so they produce a tension int the waiting time. After their falling they become ephemeral and ambiguous as vapor and they vanish in the air. Since each driping is aleatory it is not known which drop will fall first and what place and how long will last for the intervals of silences that happen between each sound of evaporation of dripping over hot plates is reavalued.
It is a sound installation that make worth of attention each of the noisless periods. When the rhythm of dropping is faster in each test tube the sounds of evaporation satrt to relate among each other, giving the way to searching of an order on sonority, inside the aleatory of all evaporations.