A Mechanical Account of Poisons in Several EssaysMead, Richard
Science
A Mechanical Account of Poisons in Several Essays
Mead, Richard
Poisons -- Early works to 1800; Venom -- Physiological effect -- Early works to 1800
Thus a violent _Poison_ is mitigated into a _Vomit_ or _Purge_;
nay, it may easily happen (especially in Robust Constitutions, and
if the Bowels be at the same time by any means defended against the
Stimulating Power of the Medicine) that this Twitching may be so
slight, as to be almost insensible, and hardly troublesome; and then
the _Mercurial Globules_ being freed indeed from most of the _Saline
Parts_ in their Passage thro’ the _Primæ Viæ_, but still having a
mixture of some few of them, are quickly conveyed into the Blood,
where by their Motion and Weight they must necessarily dissolve the
Preternatural Cohæsions of all the Liquors, particularly of Those which
Circulate in the smallest Canals, and are most Viscid and Tenacious,
making ’em more Fluxile and Thin, or of more easie Secretion; whereupon
all the Glands of the Body are, as it were, set to Work, and Scoured
of their Contents; but the _Salival_ Ones especially, being many in
Number, very large and wide, and the Juice they separate of a Tough and
Ropy Substance, so that a considerable quantity of It is accumulated
before it is forced out at the Orifices of the Ducts. These Effects
will be most remarkable in _Them_, and a _Salivation_ or Spitting must
continue so long, till the Active Mineral Particles are thro’ these and
the other Passages discharged out of the Body.
As the Difference between Mercury _Corrosive_ and _Dulcified_ lies
in a greater and lesser Degree of Operation and Force, so this same
Consideration distinguishes the several _Preparations_ of this Mineral
from each other; which tho’ very many, yet do all vary their Effects in
the Body, only according as the _Mercurial Globules_ are differently
combined with _Salts_, and the _Points_ of _These_ more or less broken
by the Action of the Fire, in the Burning of Spirits upon Them, and
such like Managements: And therefore however dignified with the great
Names of _Arcana_, _Panacææ_, _Princes Powders_, &c. They do not afford
Us any thing Singular and Extraordinary, beyond what we may with equal
Advantage promise our selves from some or other of the most common and
usual _Processes_.
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