The Sun.
London, England, 1804-09-03 00:00:00

•
HUMAN TEETH.

Ir hasiong been known that strong acids are
greatly injurious, to the teeth ; and-a recent analysts
has established, that the enamel of them will. readily
dissolve in from, six to eight times its weight of
nittid acid. The enamel is composed of 78 parts
of 'phosphate of lime, and six of carbonate of lime,,
out of every hundred parts ; the remainder is lost
in evaporation. , The teeth of an adult yield, on
analysis, in too grains, 64. grains of phosphate of
lime, six of carbonate of lime, and 30 of gelatine.
The shedding teeth'of children have two grains less
of phosphate of lime, and their specific gravity is less.
The root, or bone of the tooth, has 6z parts lime in
too, and although not immediately effected by acids
as: the enamel, which is 84, parts lime, yet the de.
composition is no less certain.
• A tooth thrown into, eight times its weight, of
sulphuric acids will, in ,ao hour, , throw up small
bubbles, the' roots bec.'me blackened, and in twelve
hours the enamel butsts and separates. Nitric and
muriatic aci.ls aft instantaneously on the tooth', ac..
companied with an evolution of a quantity of small
air bubbles from the whole of. the. surface. About
eight times their weight of these. acids are sufficieot
for the restoratiim of the solidifying principles of
the teeth. The
form
usidisiolved has nearly
the original form of the tooth, is flexible, semi.
'transparent, and easily divided, by the nail. Dis..
tilled vinegar, when concentrated, •atis both on the
phosphate and carbonate of lime. •
'The phosphate .)1 lime,•which, as we have already
stared, constitutes 78 parts in too of the enamel of,
teeth,, is soluble in the weakest acids, and if me.
chanically suspended in water, it is speedily and
completely dissolved by passing a copious stream of
carbonic acid gas through it. - ,

Saturday evening last a Coroner's Inquest was
held at the Middlesex Hospital, uppri the body' of
Mrs. SIJAW, who was suddenly taken ill, fell do'cvn,
and instantly expired, while walking in lyforsimer.
street, on Friday afternoon.
It appeared, that the deceased had been afflicted
with'a sort of violent cough, for about these last
three years. While walking clown Morritner.street,
about four o'clock in the atternqon of Friday last-,
she was attacked with a fit of coughing, in so, via.
lent a manner, as to cause the bursting of.one of the
piincipal blood vends in the thioat,: a great effty.
sion of blood immediately. folloWed, which produced
instant suZcation,
.so as to render all medical aid
totally thele4s.
The Jury brought in a verdift of,Sudden Death,
by the €visitatiott of dor/.
The deceased was a most amiable and beautiful
young woman, of about years of age, graceful
in her person,. and
.elegint in her manners. She
resided at No. 25, Suffvlk.szreer, Mi4dlesex Hos.

tilUitsDAY, AUGUST Z 3- -
IN the Crown Court, came on -before Mr. Jus-
tice Fox, the trial of James Christy, who tires in.
dicleil for feloniormly conspiring, with certain per-.
sans unknown, to take away the life of George
Nixon, Esq.
Mr..JAmEsoltr, King's Counsel, stated the Case
with much accuracy and ability, and illustrated the
heirioui crime of Conspiracy with elegance ketid for Ce.-.
He mentioned that Mr. Nixon has been for upwards.
of 2-4. years a Magiltrate for the County of Cavan ;
that during that time the County ai large, the. Pro.
testant inhabitants of the neighbourhood where he
resides, and the late and present Goveinor, had, at
different periods, borne the most honourable testi-
mony to the manner in which he had discharged his
duty. After paying Mr. Nixon many flattering
compliments, among which he mentioned the hand.
some ,offer be had made to Government of,raising a
Vo-lunteer Corp', he said, that during' Mr. Nixon's
residence in Fermanagh, the inhabitants of Dugan,
and the neighbourhood of Virginia,' were proverbial
for the spirit of litigation which they always mani.
Tested, and that. since Mr. Nixon's' residence here,
he has, by his'exertions, restored that part of the
Counts' to "a state of harmony to which it had been
long a stranger,
Mr. JnmEsoN observed,.that the present situation
of this Country. when we were engaged' in a just.
and necessary War---a N'tar for securing to, us the
blessings •of that Liberty which had been trampled
upon by
.the Enemies of the World—that the situa-
tion of the Country, he'. said, called' forth' the ex.
ertions of NI attive Magistrate' to be zealously em-
ployed, in ;Awing those Lai,Vs into force which
the judgment of Parliament had deeMed necessary
for defence ; that Mr. Nixon, as a: Justice of the
lace and Deputy-governor Of the County of Cavan,
was particultrly cal:ea upon to procure a quota of
inen for the Army of Reserve ; and that from his
exertions in the high situation in which he was
Tined, he had incurred. the hatred of many persons'
,of that class of which the Fawner, Christy, was
One.

YOOLE, AUGUST :1, .
Arried—the CearAe, :torn To.h,yr ; Tr ?
Alzlrld e, Tort Souttrainprgn ; rrier,sfrotn Ports-
month ; an i Amity, King, .from
Sailed-,-4hs Lark, Strunworth, Nelson, S3luiders, Henry; -
llalne, and Ntinerva„ BA!, for Newfoun,liand ; Molly, fe
kins, for PorrsntOnth; Carde,„ rqr Swansea,.Hore;
Monel4ws, and (col Intent, Rightllzaa, fur Sbutharnp-
ton ; and Ann, tioiloway, for Cowes. .

• • cßAvrsztio, AVG. 31. - •
Passel by—the Preideiii, flora the Cape of boat
Hope and,frzocisons, tVed‘v,e, from ttolterdam.
Sitiled—the •Ciraidie, Poynter, for kVaierford'; • tiazrcli
Hanna; for I.j.ntzic; 'add Isabclta, Vanderiee, for Eirtb:
den.