Spying the servant, who until now had seemed unable to move, he threw both arms around her, bringing the rat close to her face. Around the laboratory they danced to the tune of the woman's shrieks. The professor held on, and the woman yelled. Up and down spasmodically on the laboratory floor came the two hundred and ninety pounds with the professor thrown in. Bottles tumbled from the shelves. Furniture was upset. Precious liquids flowed unrestrained and unnoticed. Finally the professor dropped with exhaustion and the rat and Mag Nesia made a dash for freedom. Early in the morning pedestrians on Arlington Avenue were attracted by a sign in brilliant letters. Professor Carbonic early in the morning betook himself to the nearest hardware store and purchased the tools necessary for his new profession. He was an M.D. and his recently acquired knowledge put him in a position to startle the world. Having procured what he needed he returned home. * * * * * Things were developing fast. Mag Nesia met him at the door and told him that Sally Soda, who was known to the neighborhood as Sal or Sal Soda generally, had fallen down two flights of stairs, and to use her own words was "Putty bad." Sal Soda's mother, in sending for a doctor, had read the elaborate sign of the new enemy of death, and begged that he come to see Sal as soon as he returned. Bidding Mag Nesia to accompany him, he went to the laboratory and secured his precious preparation. Professor Carbonic and the unwilling Mag Nesia started out to put new life into a little Sal Soda who lived in the same block. Reaching the house they met the family physician then attendant on little Sal. Doctor X. Ray had also read the sign of the professor and his greeting was very chilly. "How is the child?" asked the professor. "Fatally hurt and can live but an hour." Then he added, "I have done all that can be done." "All that _you_ can do," corrected the professor. With a withering glance, Doctor X. Ray left the room and the house. His reputation was such as to admit of no intrusion. * * * * * "I am sorry she is not dead, it would be easier to work, and also a more reasonable charge." Giving Mag Nesia his instruments he administered a local anesthetic; this done he selected a brace and bit that he had procured that morning. With these instruments he bored a small hole into the child's head. Inserting his hypodermic needle, he injected the immortal fluid, then cutting the end off a dowel, which he had also procured that morning, he hammered it into the hole until it wedged itself tight. Professor Carbonic seated himself comfortably and awaited the action of his injection, while the plump Mag Nesia paced or rather waddled the floor with a bag of carpenter's tools under her arm. The fluid worked. The child came to and sat up. Sal Soda had regained her pep.