286 OF DRUNKENNESS.- SECT. XXI. j, 



painful fenfaticn. And hence a greater' quantity of 

 pleafurable fenfation is introduced into the conftitu- 

 tion ; which is attended in feme people with an in- 

 creafe of benevolence and good hurnour. 



If the apparent motions of objects is much increa- 

 fed, as when we revolve on one foot, or are fwung 

 on a rope, the ideas of thefe apparent motions are 

 alfo attended to, and are fucceeded with pleafurable' 

 fenfation, till they become familiar to us by frequent 

 life. Hence children areatfirft delighted with thefe 

 kinds of exercife, and with riding, and failing, and 

 hence rocking young children inclines them to fleep. 

 For though in the vertigo from intoxication the 

 irritative ideas of the apparent motions of objects 

 are indtflinct from their decreafe of energy : yet 

 in the vertig,o occafioned by rocking or fwinging 

 the irritative ideas of the apparent motions of ob- 

 jects are increafed in energy, and hence they induce 

 pleafure into the fyftem, but are equally indiftinct,. 

 and in confequence equally unfit to balance our- 

 felves by.- This addition of pleafure precludes de- 

 fire or averfion, and in confequence the voluntary- 

 power is feebly exerted, and on this account rock- 

 ing young children inclines them to ileep. 



In what manner opium and wine act in relieving 

 pain is another article, that well deferves our atten- 

 tion. There are many pains that originate from de- 

 fect as well as from: excefs of ftimulus ; of thefe are 

 thofe of the fix appetites of hunger, thiril, lull, the 

 want of heat, of (Mention, and of frefh air. Thus- 

 if our cutaneous- capillaries ceafe to act from the 

 diminifned ftimulus of heat, when we are expofed to 

 cold weather, or our ftomach is uneafy for want of 

 food ; thefe are both pains from defect of ftimulus, 

 and in confequence opium,, which, llimulates all the 

 moving fyftem into increafed action, muft relieve, 

 them. But this is not the cafe in thofe pains, which, 

 arife from excefs of ftimulus, as in violent inflamma^ 



tions : 



