She sought to reassure him but he did not wait. He dashed down to the subway, promising to telephone to her. By ten, he was peering into his incubator.
There was a cloudy appearance of bacteria in all the flasks except those in which he had used broth from the original alarming flask. In these, the mysterious murderer of germs had prevented the growth of the new bacteria which he had introduced.
"Great stuff," he said.
He returned the flasks to the incubator, recorded his observations, went again to the library, and searched handbooks, bound proceedings of societies, periodicals in three languages. He had acquired a reasonable scientific French and German. It is doubtful whether he could have bought a drink or asked the way to the Kursaal in either language, but he understood the univer
