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1 66 
other fymptoms of the weakened or fenlle Rate of the nervous 
fyftem, induced before the ufual period. 
" Among; other effeds of excefs in fniifEnP:, I have fonnd all the 
fymptoms of dyfpepfia produced by it, and particularly pains of the 
ftomach, occurring every day. The dependance of thefe upon the 
ufe of fnuiF became very evident from hence, that upon an acci- 
dental interruption of fnuffing for fome days, thefe pains did not 
occur ; but upon a return to fnuffing, the pains alfo recurred ; and 
this alternation of pains of the ftomach and of fnuffing having 
occurred again, the fnuff was entirely laid afide, and the pains 
did not occur for many months after, nor, fo far as I know, for 
" the reft of life. 
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A fpecial eifedl of fnuffing is its exciting a confiderable difcharge 
" of mucus from the nofe ; and there have been feveral inftances of 
headachs, toothachs, and ophthalmias relieved by this means : and 
this is to be particularly remarked, that when this difcharge bf 
mucus is confiderable, the ceafmg or fuppreffion of it by abftaining 
from fnuff, is ready to occafion the very diforders of headach, 
toothach, and ophthalmia, which it had formerly relieved. 
Another effed of fnuffing to be taken notice of is, that as a part 
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of the fnuff is often carried back into the fauces, fo a part of this 
is often carried down into the ftomach, and then more certainly 
produces the dyfpeptic fymptoms mentioned. Thefe are the con- 
liderations that relate to fnuffnig ; and fome of them will readily 
apply to the other modes of ufuig this dru 
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Smoking, when firft pradifed, (hows very ftrongly the narcotic. 
vomiting, and even purging powers of tobacco, and it is very often 
ufeful as an anodyne ; but by repetition thefe effeds difappear, or 
only ftiow themfelves when the quantity fmoked is beyond what 
habit had before admitted of; and even in perfons mucli accuftomed 
to it, it may be carried fo far as to proVe a mortal poifon. From 
much fmoking all the fame effeds may arife which we faid might 
arife from excefs in fnuffing. 
" With refped to the evacuation of mucus which is produced by 
fnuffing, there are analogous effeds produced by fmoking, which 
commonly ftirnulates the mucous follicles of the mouth and fauces, 
and particularly the excretories of the falivary glands. By the 
' , ^ ■ " evacuation 
* 
