s, and common salts one ounce, dissolved in two wine pints of
water, half a pint to be taken every hour till it purges. The worm extends
from the stomach to the anus, and the amalgama tears it from the intestine
by mechanical pressure, acting upon it the whole way. Electric shocks
through the duodenum greatly assists the operation. Large doses of tin in
powder. Iron filings in large doses. The powder of fern-root seems to be of
no use, as recommended by M. Noufflier.

12. _Ascarides._ Thread-worms. These worms are said to be more frequent in
some parts of this kingdom than in others, as near the fens of
Lincolnshire. Do they escape from the body and become flies, like the
bott-worm in horses? Do they crawl from one child to another in the same
bed? Are they acquired from flies or worms, which are seen in putrid
necessary houses, as these worms as well as the tapeworms, are probably
acquired from without? this may account for their re-appearance a few weeks
or months after they have been destroyed; or can this happen from the eggs
or parts of them remaining?

Ascarides appear to be of two kinds, the common small ones like a thread;
which has a very sharp head, as appears in the microscope; and which is so
tender, that the cold air soon renders it motionless; and a larger kind
above an inch long, and nearly as thick as a very small crow-quill, and
which is very hard in respect to its texture, and very tenacious of life.
One of these last was brought to me, and was immediately immersed in a
strong solution of sugar of lead, and lived in it a very long time without
apparent inconvenience.

M. M. Ascarides are said to be weakened by twenty grains of cinnabar and
five of rhubarb taken every night, but not to be cured by this process. As
these worms are found only in the rectum, variety of clysters have been
recommended. I was informed of a case, where solutions of mercurial
ointment were used as a clyster every night for a month without success.
Clysters of Harrowgate water are recomended, either of the natural, or of
the factitious, as described below, which might have a greater proportion
of liver of sulphur in it. As the cold air soon destroys them, after they
are voided, could clysters of iced water be used with advantage? or of
spirit of wine and water? or of ether and water? Might not a piece of
candle, about an inch long, or two such pieces, smeared with mercurial
ointment, and introduced into the anus at night, or tw