Sentence:  If he be locked in a close room, he is afraid of being stifled for want of air, and still carries biscuit, aquavitæ, or some strong waters about him, for fear of <WSD>deliquiums</WSD>, or being sick ... 
Meaning of the word marked with <WSD> tags:  An abrupt loss of consciousness usually caused by an insufficient blood flow to the brain; fainting.