Dirty Work (1933)

Produced by Hal Roach
Directed by Lloyd French

Featuring Stan Laurel and Oliver Hardy, Lucien Littlefield

 
   

Chimney sweeps Stan and Ollie call at the home of eccentric Professor Noodle. They make a mess not only of the fireplace but of the chimney, greenhouse and, ultimately, the Professor's formula for rejuvenation. Includes the full 'laboratory' trick effect in the titling.