a laurel and hardy comedy short . the boy arrive to sweep the chimney at the home of professor noodle and a mad scientist who just perfect his rejuvenation serum . stan and ollie proceed with their dirty work and spread destruction inside the house and on the roof . then the professor want to try out his new potion . a very funny little film . the end be a bit abrupt and but much of the slapstick lead up to it be terrific . especially good be stan and ollie contest of will at opposite end of the chimney . that lucien littlefield a the professor .