“Listen, Hinez,” exclaimed Deriugin, his voice ringing with excitement, “I understand that my words seem strange to you, perhaps brazen, but the situation is too serious for us to fret about formalities. I have been watching the work of the professor for a long time and was very much interested in it. But now, I repeat, I am afraid that some mishap has occurred there.” Hinez silently shrugged his shoulders, yet, he too felt that he was becoming affected by an incomprehensible alarm.

They unlocked the door of the laboratory. In the assistant’s room, a servant with a long iron rod, on one end of which a rag was tied, was cleaning the room. The servant welcomed the entering pair with a curt: Guten Tag. The two whisked through the room directly into the laboratory of the professor.

Hinez led the way. On the threshold of the large room he halted unwillingly and covered his eyes with his hand, blinded by the unexpected light. Behind him stood Deriugin; silent and pale as a ghost, he was contemplating the picture that lay before their eyes. Upon a large marble table, where the new adjustments were gathered, shone, with unbearable brightness, a fiery sphere the size of a man’s head. It quivered, as if it pulsated. Upon its dazzling background, bluish veins crossed themselves and everything about it was covered with a bluish mist. At the place where the sphere had touched the surface of the table, a light sizzling and crackling was heard. The room was hot and suffocating, as it is before a big storm, and a sharp smell of ozone assailed the nostrils.

Hinez and Deriugin stood like a pair of statues, not daring to move from their places nor to remove their eyes from the strange phenomenon.

“Herr Hinez,” exclaimed the surprised servant, who had followed them into the laboratory, “something is burning there!”

And before either of them had a chance to stop him, he ran over to the table and drove the end of his iron rod into the face of the fiery sphere.

A dry, loud crack followed. A dazzling spark, resembling a short lightning, flashed out at the end of the rod and the old man dropped backwards, spreading his hands and knocking his head against the hard floor. His body twisted up in spasms and remained motionless. All this took place, it seemed, within the twinkle of an eye. When Hinez rushed over to the old man, bending over him and trying to raise him up, he no longer breathed.

“Dead!” confusedly announced the assistant, retreating unwillingly and turning back his head to his colleague. Deriugin, standing at the door, repeated mechanically one and the same phrase: