Leonard K. Nash, associate professor of Chemistry, actively disproved the Phlogiston theory in Natural Sciences 4 yesterday morning by an unintentional explosion which slightly injured him, deafened his students, and shattered glass as far as the back row of Burr A.

The explosion occurred at the beginning of the hour, but Professor Nash "was determined the lecture must go on," despite his wounds, said Miss Constance A. Brewer, a section woman in the course. Nash wrapped his cut hand in towels, and lectured for 15 or 20 minutes before he was obliged to stop and go to the Infirmary. Three section men helped him out of the room.

Two girls sitting in the front row were also injured by the blast, receiving minor cuts on their faces and legs. Included in the casualty list was a boy in the back row, who, after requesting a glass of water to steady his nerves, turned pale and fainted.

According to Miss Brewer, there was a "terrific noise," which shook the lecture room. Broken glass was spread all over, and some was found on the ceiling. One student in the back row also discovered bits of glass in her notebook after class.