Titles read: "Now Pathetone Presents - THE FOUR SPALLAS in Acrobatic Entertainment".
London, probably Pathe Studio.
Various shots of acrobatic act The Four Spallas getting into several balancing postures. They are three men in white leotards and close-fitting caps and a blonde girl in a two-piece costume - she is extremely supple!
The last posture is one that they made famous, according to the commentator, and shows one of the men balancing upside down on the shoulders of the other two while the girl balances on the thighs of the two standing men.