He moved to Upper Normal School, where he received a scholarship for physics at the Faculty of Sciences at the University of Bucharest.

In 1894, in preparation for his thesis, guided by his teacher, the Romanian scientist invented an insulator made up of a mixture of sulfur and paraffin used in the construction of electroscopes and named it "dielectrine".

On April 28, 1896, Dragomir Hurmuzescu defended his doctoral thesis, titled "Sur une nouvele détermination du rapport V entre les été électrostatiques et électromagnétiques", which included one of the most accurate measurements for the speed of light.

In 1896, after obtaining his doctorate degree, Hurmuzescu returned to Romania and was appointed lecturer at the Department of Mathematical Physics from the University of Iași.

The idea for accepting such a political appointment was that it was the only way to finance the development of education in a form as it had been seen in the West.

From this position, Hurmuzescu sought ways to establish a more effective experimental education in physio-chemical sciences.