3o4 of the external senses.

its nurfe, and the other people who are muchabout it, from ftrangers. It clings to the former,and turns away from the latter. Hold.a fmalllooking-glafs before a child of not more then twoor three months old, and it will flretch out itslittle arms behind the glafs, in order to feel thechild which it fees, and which it imagines is atthe back of the glafs. It is deceived, no doubt;but even this fort of deception fufficiently de-monilrates that it has a tolerably dillinfl appre-henlion of the ordinary perfpeflive of Vifion,which it cannot well have learnt from obfervationand experience.

Do any of our other fenfes, antecedently tofuch obfervation and experience, inflinclively fug-geft to us fome conception of the folid and re-filling fubflanc.es which excite their refpe£five fen-fations; though thefe fenfations bear no fort ofrefemblance to thofe fubftancesP

The fenfe of Tailing certainly does not. Beforewe can feel the fenfation, the folid and refillingfubflance which excites it mult be preffed againftthe organs of Talle, and mull confequently beperceived by them. Antecedently to obfervationand experience, therefore, the fenfe of Tailingcan never be faid inltinifively to fuggeft fome con-ception of that fubflance.

It may, perhaps, be otherwife with the fenfeof Smelling. The young of all fuckling animals,( of the Mammalia of Linnaeus, ) whether theyare bom with fight or without it, yet as foon asthey come into the world apply to the nipple of