The workingman's advocate. [volume] (Chicago [Ill.]) 1864-1877, 1870-08-13
SCIENTIFIC AND MECHANICAL.

To REMOVE SILVER STAINs-One of
the best ways is to wash the spots with q
concentrated solution of sulphate or chic
ride Of zinc and to rub the worst places
with metallic zinc. Then rinse in pure wa
ter, and complete the washing with soap.
Ink stains can be removed in the same way.
In view of the successful result of the
Suez Canal undertaking, two new lines Of
twenty-three steamers are spoken Of in
tended to run between England and China
Uid the Canal. 1t is expected other com
panies, with similar intentions, will be
shortly organized.
CORsETs AND CHIGNoNs.-Medical sta
tistics in France, it is said, have proved
that mortality among the female sex has
diminished since corsets have become less
fashionable; but that the wearing Of CHG
mons increases diseases Of the brain, with
frequently fatal results We imagine that
the increased mental disturbance is mostly
occasioned by the efforts and anxieties Of
the i4ir ones in adjusting their chignons
REFRIGERATOR CARS To THE East
The Blue Line advertises that it des
patches refrigerator cars daily from the
Michigan Central depot TO New York and
Boston for the transportation Of butter,
eggs, and other perishable articles, which
in this way are not affected by the hottest
weather.
| EXPERIMENTS WITH HYDRATE OF CHIC
RAL.-The reader will find on another page
an account Of some experiments with By
drate Of chlora made upon himself by DR..
f. A. Howig, Of jackson, Michigan. The
doctor writes us that be is forty years old,
10 tolerable good health, and of a decided
nervous temperament The FIRST four ex-
periments were made with choral bearing
the name Of Powers and Wightman, the
last manufactured by E. Schering. The
reader curious to learn more of the effects
Of this new remedy, will find the expert
ments described Of interest.
EVERY year the sugar mandatory Of
Ialfweg, situate between Amsterdam
and Harlem, sends into the province a
seed sowing machine for use in the
fields devoted to the culture of the beet.
Advances are even made to the pro
prietors OF the ground, on condition
that they sell their products at the man
ufactory above mentioned at mer-
charitable price. In this way the popu-
lation is initiated in the employment OF
agricultural machines, at the same time
being engaged in work advantageous
to the country.
! New METHOD OF PRODUCING leg
Franz WindhOuser, of the Duchy OF
Brunswick, in Northern Germany, has,
it is said, invented a new ice machine
The cooling process takes place in cyl
inder, where the air is first powerfully
condensed, then cooled by the admis
sion of water, and finally expanded til
its pressure is about equal to that OF
the atmosphere. This simple process
We are told, leads to astounding results,
for it lowers the temperature OF the air,
so that after the latter has been con
/ Quoted, in moderate quantities, into a
space through which water flows, this
water il almost Immediately turned into
\ ice, Of which enormous blocks may be
thus obtained if desired. The inventor
is very sanguine about the utility OF
the machine for cooling large apart
ments, theaters, hospitals, and other To-
calities where the want Of pure, cool
air is often much felt. No chemicals
whatever are required, either for the
freezing or cooling process. Of course,
this is all correct in theory, but prac-
tically we doubt that air can be thus
used as cooling agent with economy.