Means: swinging .2

One of the most constant effects of swinging is a greater or less degree of vertigo, attended by pallor, nausea, vomiting, and frequently by the evacuation of the bladder.

The singular and unusual motion of the swinging, when continued with increased velocity, induces first paleness, then nausea, and then alternately an obvious change in the circulation, and giddiness: these changes necessarily result from an impression made on those organs of sensibility, the brain and nervous system, and prove that the remedy acts on the seat of the disease; though the proximate cause cannot be satisfactorily ascertained.

C***
Practical Observations on Insanity, p. 156, 157.