 Following their acquisition, a new analysis of the waters by professor Herculano de Carvalho, referred to the existence a variation in the alkalinity in the two springs, that included magnesium, silica and carbon dioxide.Beginning in 1935, the clinical directorate began to employ glycemic curves systematically as a method of investigating the effects of the water on diabetes sufferers.With consistent growth and visitors, at the beginning of the 1950s, there was a need to erect a specific building to shelter the water from the Prado spring, in order to substitute the wooden structure.