Based on the chapter, here is a point-wise summary of the story "The Stolen Bacillus" by Herbert George Wells:

• The Demonstration: A Bacteriologist shows a "pale-faced" visitor a slide of cholera under a microscope and subsequently shows him a sealed tube containing "Bottled cholera," a cultivation of the living disease.
• The Anarchist’s Interest: The visitor, who is an Anarchist, expresses a morbid fascination with the bacteria's power to devastate a city, suggesting that using such a biological weapon is more effective than using bombs.
• The Theft and Pursuit: After the visitor leaves, the Bacteriologist realizes a tube of the bacteria is missing. He immediately rushes out of his house in his slippers and without a hat to pursue the visitor, who has fled in a cab.
• The Anarchist’s Plan: While being pursued, the Anarchist feels a sense of triumph, planning to poison the London water supply so that the world will finally take notice of him.
• The Accident: During the high-speed chase, the glass tube breaks in the Anarchist’s hand. To ensure his plan does not fail, he drinks the remaining drops of the liquid, believing he will become a "martyr" by spreading the disease through his own body.
• The Defiant Confrontation: The Anarchist stops to face the Bacteriologist, mockingly informing him that he has swallowed the cholera and that the disease is now "abroad".
• The Twist Ending: After the Anarchist walks away to try and infect as many people as possible, the Bacteriologist reveals the truth to his wife, Minnie: the tube did not contain cholera. It actually contained a new species of bacterium that turns animals (like kittens and puppies) blue.
• The Bacteriologist’s Reaction: Rather than being afraid of a plague, the Bacteriologist is simply annoyed by the "trouble and expense" required to prepare a new cultivation of the blue-staining bacteria.