New-York tribune., 1874-08-26
xEDIcA1 AND SURGICAL NOTES.

po,sovors CoxFIrs-In Mr.. Atcherley's re-
.on, nocr exposing some Of the present practices In
a,.ratins food he states that whitening plaster OF
ar,s and the basis OF many comats ana
drao<es" which should consist OF flour and sugar only
Prussic acid may be found IN many sweemeats ana ha
yoriugs where impure oil Of bitter almonds or ni'ro
benzo been used to convey the taste OF noyea"
ter almonds cherry and peach kernels, etc. Inc ooio
ipg materials are either painted on the surface OF
dused throughout the Of the article under 're'V
ment Prussian blue has been consideredana Uy
persons not absolute ignoramuses-a ponIonvu
ment but there is no evidence ade bV Dr. Cameron
Dublin gives the following Description y, ""cstmeat
msas seEy d plaster Of paris
and the body OF the BABY was % SaSs stained with
s,9es, and us clothes were painted with chiomate OF
iead These are manufactured in large quantities.
IMPROVEMENT IN DENTIsTRY.-Dr. Hirschfeld
Gives an account in The Dental Cosmos of his substitute
for solid gold filling in the roots of teeth when the roo'
rs I'm proper condition for filling his method Is 10 seiect
thread of lint separate loosen the hbers as much as
possible and then moisten 1t with chloride OF zinc from
the cement boxes rubbing also oxide OF zinc wei
but omitting one extremity Of the lint TINS pelhg re-
served for the application of small quantity OF csfpoo
ac,d The thread is simply the medium for conveying
the cement to the extremity of the canal and entirely
tmbedded in IT, The of the lint saturated with car
boc acid is OF course the first inserted and Is carried
directly TO the apex After the root is hed tne
sandsrac and II at the expiration Of several days tne
tooth has been perfectly comfortable ana tDe III
healthy condition he inserts gold nIllg i te
cavity. IT. however the pulp had been deprived OF
vitality for long period and the tooth easy rd Itb
semet Dr. H. states that by operating in this msnner
he has had periostitis occur III tue iaf SC
teeth which he has thus treated.
THE HEART MECHANICAL MoToR.-Les
Nondes attributes 10 Dr. Marcy the recent demonsra
lion that the heart acts like all mechanical motors In
that the frequency OF the pulsaton varies according 10
the resistance which it meets in driving the blood
through the vessels that is when the resistance De-
comes greater the hrobs diminish and on the contrary
they accelerate II the opposition becomes less. During
hfe action of the centers makes itself felt
on the heart, of which renders the pusaons slower
or quicker whatever may the resistance experienced
Dr. Marcy is said to have eliminated this nervous In
uenee by removing the heart OF an animal ana
il to work under purely mecnanca c0nu,toas, ~
rubber tubes representing veins and arteries; cats Dood
snstpument noted the amplitude aud frequency of the
OF the organ. When the TUBE containing tne
blood leaving the heart was compressed, the hqua n
emptled itself with greater difficulty, the pulsstlons
weakening perceptiby on relaxing the pressure o1us
allowing to the BLOOD the throDs accelerated
rapidly.
ARTIFICIAL REsPIRATIoN.-The new method
of artificial respiration brought forward as substitute
for Dr. Marshall Halls, is warmly commended by some
of the foreign medical journals According TO this sys
tem the patient is laid the ground upon his back
his arms fully extended backward aud outward firm
roll of clothing being placed beneath the false ribs so
as 10 throw their anterior margin prominently forward
The tongue being held forward by an assistant, the
operator facing the patient knees asrte his abdomen
and places both hands that the balls OF the thumbs
upon the anterior Margin OF the false ribs the four
fingers falling naturally into the four corresponding in
tercosta spaces on each SIDE The elbows Of the
operator being then planted against his sides, he ha
but to throw himself forward, using his knees as
pivot and the entire weight of his trunk is brought
bear upon the patients false RIBS IT, at the same time
fingers of the operator and squeeze the fast
ribs each other these combined actions crowC
the false ribs upward and inward producing the grea
possible motion of the diaphragm and dlsplace
of the contents of pulmonary aifcels The operator
then suddenly lets CO. and returns to the erect position
his knees when both the thrush Of air and the
natural elasticity Of the ribs this part instant
return their normal position. This repeated with
proper rhythm aud frequency, constitutes the entire
process.