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SECTION Iv. 
Tuere is one circumftance, however, that renders it 
more difficult to inveftigate the certain effects of Tea; which 
is, the great unwillingnefs that moft people fhew, to giving us 
a genuine account of their uneafy fenfations after the free ufe — 
of it; from a confcioufnefs that it would be extremely impru- 
dent to continue its ufe, after they : are convinced from expe- 
_riénce that it is injurious. 
That it produces watchfulnefs in ins Siitticns. is moft 
certain, when drank at evening in confiderable quantities. 
Whether warm water, or any other aqueous liquor, would 
have the fame effect, is not certain. 
That it enlivens, refrefhes, exhilarates, is likewife well 
known. From all which’ cireumftances it would feem, that 
Tea contains an active penetrating principle, f{peedily exciting 
the ‘action of the nerves; in very irritable conftitutions, to 
fuch a degree ‘as to give very uneafy fenfations, and bring on 
_ fpafmodic affe&tions: in lefs irritable conftitutions, it rather 
_ gives pleafure, and immediate fatisfaction, though not without 
_. Oanenally producing fome oe to culagresable # tremours. 
and oitati on. 
