Definition of "jejuneness"

I do not suffer any more from brain fag. If I feel symptoms of a return of mental vacuity, I take of the hypophosphites and the intellectual jejuneness is immediately suppressed. My only objection to it is, that it creates in me an inordinate, and unseemly rambunctiousness. For a three scorer, who is now little more than a parchmental reminiscence, this is unbefitting.

1896, C., “The Hypophosphites”, in The Medical Gleaner, volume VII, Cincinnati, Oh.: Sullivan Printing Works, pages 61–62