New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1875-02-09

,ika fracture throughout its whole length. When
different kinds OF iron are mixed, she acu th
that for which it has the greater affinity, whie the
other is less acted upon than III u were atone I'll
ing is exceedingly valuable TO all VINO deal laIso,y
in ron it enables them to deternne VIII . ;n m
stiye accuracy the method OF preparing ihe Ipn, do
in the case of rails, &c. rs wen as tno Aius CHI
pl0yed
Nrw CAppoyIc FSGIYE-De BeiDs OF Amsterdam
has communicated the results OF his latest expert
tnents with carbonic acid motive-englnes lie mas
for many wears studied the question OF the Trans
formation of heat into mechanical power, and IN
seeking TO ascertain the degree OF pressure evolved
bv carbonc acid disengaged from bcarbonate OF
soda heated in confined space, he found that when
tho bcarbonate of soda of potash, either in the
condition of dry powder or of aqueous solution.
was heated in a confined space. part of the car
bonic acid became disengaged and condensed in o
cool part of that space in such that at the
temporature of 2jJ2 to 400 c., liquid carbonic acid
could be distilled from these salts under pressure
of so TO 60 atmospheres.
This fact he considers as of great Importance, as
carbonic acid under high pressure, or as Dr. Beins
calls Il "Carbolcum," is physically very remark
able body, which may be easily obtained in large
onantties The study of tho relations Of bodies sub
mitted to high pressure is only in its infancy, and to
pursue it simple apparatus for compression is all
mospheres it is of course not necessary to raise the
temperature to 5000 and 1902 C. With 4 saturated
solution of bicarbonate of Soda heated to boiling
point in bath of concentrated common salt, car
bonic acid of three to five atmospheric is obtained
and the pressure increases regularly with tho tenn
perature
Carbonc acid at a high pressure. or carboleum,
supplies excellent motive power for small and great
industries This was remarked By Faraday, who
discovered liquid carbonic acid, and since by
Thilorcr and others; but unfortunately the law OF
the preservation of the energy Indispensable III such
cases was not known. liter OF earboleum at l5'
c.. and with pressure OF 80 atnospheres,
weighs approximately 0.S kIlos and Will produce
400 ers of carDOnic acid at tho ordinary pressure
The power required to produce com preston TO the
extent of 81 atmospheres Is eqlal to about l',oJO
kilogranmeters This gives 270,0O0 kilcgr1mme-
ters per hour and per horse power for 10 liters OF
carbueum at 30 atmospheres, and 150 G.
Ii is only when a carbOleun engine works with
large intervals between. that the heat of evapora-
ton can be carried to the sides Without heating
artfcially. In the majority OF cases the carboeum
must be cyaDorated by the artificial hea ting OF small
quantities at a time The heat required per horse
power per hour, az already given. namely, 10000
klogrammcteIs is equal al least to 6lO calorles
(01 Kill of COAL. go
regeneration. They should have depot Of silt Of
soda and carbOleum, so arranged that the decOm-
posed bcarbonate shall be resenerated by the car
machine transforms very adyantageOusy into me-
chanicai power the heat supplied by the lire TO de-
compose the bicaTbonate constantly resenerated.
Surprising the gas to act at the temperature of 1902
Co. the 16 lters of carboleum necessary per horse
power per hour Will DO reduced TO 10 htcrs. Such
an engine requires about 03 kilOs. Of coal per horse
power per hour while the best constructed steam
engine consumes 12 to 90 kilOs. For ships, the
weight OF an engine of 100 horsepower, with fuel
for go hours will IT, one-ifth loss than that of n
steam engine of equal power. And as several parts
Of a carbolcum engine require 10 be more massive
il will take up ic6S room. CarbOlcum presents no
danger, as ii contains no cause Of explosion. 1t Is
easy to prevent too abundant accumulation OF gas
in the engine room. which would render the air unfit
for respiration. When not III contact with water
the metallic parts of the engine are not Affected by
The carbouic acid. Metals are not permeable by
gases at that pressure. In large works the car
boeuIn engine WILL in neatly all cases, replace the
steam engine. In small Establishments, and es-
pccialy when the engines only worked at inter
vas and Tor short periods the fact OF the carboeum
being always ready 10 act at a moments notice, Is
of great Importance as. for instance to drive print
ing presses steam pumps. portable engines. &C. a
ca.bolcun engine is also excellent and economic
source of electric light. NJ. Bclns also recommends
the csIbCcJm engines as specially adapted to sub
marine IgSsyI3.