The Democratic press. [volume] (Ravenna, O. [Ohio]) 1868-1901, 1880-11-18
POPULAR SCIENCE.

Gerard-Lcscuycr finds that when
the current from Il dynamO-electriC
machine ia sent into a magnetic cleo.
trio machine the latter moves with
increasing speed, then it slackens
stops, and turns in the opposite direc.
ton, and SO OIL. The polarity of the i'll
ductOrs is reversed.
J. A. Pabst publishes this continu-
ons method of preparing acetic ether
He introduces into a rctOrt a cold mix
ture Of So C. c., Of sulphuric acid, and
the same quantity of alcohol. When
the mixture has arrived at the tempe
rature of 14O degrees ccntigrade, he al
lows to flow slowly into the rctort a
mixture of equal equivalents of alco-
hol and glacial acetic acid. At first q
little sulphuric distils over, and there
then passes liquid containing So per
cent. of acetic ether.
photometcr has been devised by Herr
TRplcr, and it is no longer necessary
to use but one eye or that the observer
take a certain determined position.
The ordinary thin sheet of paper with
the oil-spot is replaced by two thin
sheets of parchment paper placed one
OIL each side of a stout sheet of paper
perforated by hole about an inch in
diameter. The sheets are stretched on
a frame between two sheets of clear
glass. When the lights are properly
opposed, the hole in this arrangement
disappears, just as the oil-spot does in
the old device, but with much less in-
convenience. to the observer. s..
An exchange publishes the follow
in,r os n,a,ns nf CT luorinCr hu oDl1
rubbing Make a paste by thoroughly
grinding in a porcelain mortar, away
from the light, water, 8 to ounces;
chloride of silver, ounces potassium
oxalate,. 1915 ounces; common table
salt, 10 ounces, and sal aInmoniac, 3.75
ounces. Or, chloride of silver, 81
ounces; cream Of tartar, ounces;
common table salt, 1915 ounces, and
water enough to form a paste. Keep
the paste in q covered vessel, away
from tho light. Apply it with cork
or brush to the clean metallic "copper"
surface, and allow it to dry. When
rinsed in cold water the silver pre-.
sents q fine frosted appearance, tho
brightness of which may be increased
by immersion for Il few seconds in de
acid, or in solution
of potassium cyanide. The silvering
bears the action of the wire brush and
of the furnishing tool very we'll, and
it may also be "Oxidized."
NJ. Lesserteur, says the British Med
ical Journal has just given publicity
to plant which has a great rePuta-
tion as cure for rabies in the king
the name is hoang-nan. is a kind of
n1o III RI hn f.l 60
tura; its effects are similar to those of
and brucine. NJ. Bouley,
in speaking of this new remedy in the
ReceuH de Medicine Veter1naire, re-
grets that no facts cOrrobOrative of its
are given, but is of
opinion that the property recently |
shown to belong to rabbits, of easily |
hydrophobia by inocula-
ton, should be utilized for making ex-
periments thus so easily performed. |
In reference to this subject, NJ. Bouley |
related an anecdote about garlic, q
substance which has always had a
great reputation among remedies
against rabies, and is constantly found
IS a principal integral portion in a
arge number of forlnulB long kept Sc
;ret. A young man had been bitten
by mad dog, and symptoms of rabies
speedily appeared. His family, in a
state of the greatest alarm, scarcely
showing what to do with the sufferer
hut him up in loft where some gar
ic had been left to dry. In his deiir-
um the poor fellow seized the bun
lies of garlic, ate greedily of them, and
Don became exhausted and fell into a
lcep sleep. When he awokc he was
ured, and the symptoms of rabies had
disappeared. !