Worcester daily spy. [volume] (Worcester [Mass.]) 1850-1888, 1854-06-26
price Two Cents.
Gk aaiIg SPY.
MONDAY, JUNE 20, 1854.
Compiled for the Daily Spy.


heat, the bars will not only take powerful
magnetism, but keep it indefinitely Exper-
iment has shown that the following is the best
mode of tempering large bars They are tc
be heated to redness in wind furnace, then
withdrawn one by one, the two faces of the
bar are sprinkled for three-fourths Of their
length with yellow perussiate of potassa, and
Immediately plunged into great mass of cold
water, stirring it about violently. A little
more thickness should be given to bars of cast
| iron, than steel.
The patent system Of the United States
gives to first inventors, a monopoly of the
profits Of these inventions, for fourteen years.
Mere discovery does not entitle to patent
| Galvani could not have patented his great dis
| covery, nor the discoverer of potassium his
though he might have patented his apparatas
for making it. If man learns law, or a
principle of nature, he cannot get patent for
| it but he can patent his application of 1t to
some useful or mechanical end. patent IS
only granted when there Is entire satisfaction
| that no article of the sort has existed, or pub
| location Of the invention ever been made
| In this way the rights of all are secured.
new plastic composition is in use in Lon
dom 1t is formed of clean washed river sand,
blue las lime, and common cement, in about
| equal proportions. This composition is
moulded into the form of bricks or slabs, and
without firing it, dries quickly, and resists the
action of the atmosphere.
An interesting fact in science is that which
is related Of one of the Cunard steamers,
which, on leaving Halifax, had steered such
a course as should have carried her 80 miles
east of Cape Race, in Newfoundland The
weather was wintry and foggy, and the cap
tain coming on deck, in the gray of the morn
ing, found to his horror, his vessel apparently
| rushing to destruction, on an IRON bound coast.
| BY instantly reversing the engine the vessel
| was saved, when an examination of all the
compasses on board was had, aud the cause Of
alteration found to be new iron tube, which
had been placed inside the brass funnel of the
saloon, without the captain knowledge.
Cast iron, which has come to be used SO
| extensively in the arts, and in construction,
| and whose uses are daily extending, has been
made the subject of great number of exper-
iments. One gentleman has obtained for the
ultimate tensile strength of cast iron, from
$4,000 to $4,000 pounds per square inch of
cross section the results obtained by another
experimenter, also on English iron, both hot
and cold blast, was from 1900 to 5000 per
square inch.
Combustion is only the result of the extra
ordinary affinity of the oxygen Of the etmos-
| phere, for the bodies, which have been IN 1t,
and with which it is consumed. In pure
oxygen, all combustible bodies burn with
| great brilliancy anasplendor. Even wire and
other metallic bodies ara made to burn in it
with intense brightness.
BY the courtesy of that eminent house,
Messrs. w. ]. F. Daley and Co., New
York city, we recently enjoyed the opportonl-
ty of witnessing the unique process of paint
ing aud gliding China-ware, as carried on by
them. This establishment is comprised in the
magnificent new marble stores, Nos. 6Sl and
633 Broadway. 1t is the best conducted, most
extensive, and with traders, the most popular
concern of the kind, in America, and is an
honor to the commercial metropolis Of the ma
ton. We had Just spent half day at the
Crystal Palace, inspecting everything in gem
eral, aud the products of American industry
and science in particular; but, when we en-
tered the spacious saloons Of this temple of
aria perfect Giants Causeway, OF bur-
nished china,-we we're not long in conclud-
ing that we would rather have missed visit
to the Palace itself, than to this superb bazaar.
! 1t is huge structure of marble, and the sue
cessive floors are covered, in dazzling profu-
| sion, with every conceivable pattern and hue
| of China fabrics,-dinner, dessert, tea, and
household ware; French China; rich cut
glass, in hundred forms of ornament or use;
vases, of indescribable beauty bronze clocks;
chandeliers; and miscellaneous Celebrations
in the utmost variety the whole forming the
largest and most recherche assortment of this
description of goods to be found in America
The chief attraction, however, 10 one who
studies the progress of the fine arts in our
country, is the perfect skill and exquisite taste
manifested in the process of painting and gid
ing peculiar to this, and in which they stand
unrivalled 1t is well known, that, only q
few years ago, this art was almost unheard of
in this country. 1t is now, however, carried
on to as great degree OF excellence as in any
of the European cities. To the perseverance
and ingenuity Of the house of Daley & Co.,
are we indebted for much of this improve
ment; as all will agree, after examining the
elegant specimens, in every department. of
decorated China-ware, to be seen at their es-
Enlistment. Employed in this kind of work,
Meesrs. Daley & Co., have an immense num-
Der of operatives and artists, and are thus en-
abled to furnish the most beautiful and dura-
BILE wares at short notice, to dealers and ofh-
ers, in all parts of the country, and on such
reduced terms as to elfectually supercede the
imported article. We take pride in commend
ing the energy of this house, and the superla-
tive excellence of its wares, to all those who
are interested in and disposed to encourage
home enterprise, when devoted to one Of the
most useful and beautiful Of arts, carried on
under the auspices of such accomplished and
reliable men.
An English lu6CuAulc las phLcutc0 Nh1uA~
Bile improvement in safety valves. Instead of
con structing them, as heretofore practised, he
makes compound valve, by two, four, or
more openings or ori6ces near to each other,
such openings or oritces being opened or
closed simultaneously by counterbalancing
mechanism, weighted equal only to the differ
ence between the pressures upon them. In
all cases there is a down and up valve connect
ed together, and acting in concert, a float be-
ing attached to the said down valve.
1t requires four times the power to double
the velocity of wheel moving through back
water.
At the great hair and feather mandatory
of Messrs. Melen and Banks, New York, the
consumption of hair, annually, is valued at
800, 900, and of feathers 100000 In
preparing the hair, the process is as follows:
From the bales it is thrown into sspicker,'
making eight hundred revolutions per mini
ute, and then twisted into ropes by machinery.
to make it curl The next process is to boil
it, that it may be thoroughly cleansed. for
which purpose it is put into watts, heated with
"exhaust'' steam from the engine; this done.
it is thoroughly dried in an oven. The ropes
of hair are then ready to be picked into pieces
| for use.
quick deposit of aluminium may be OBJ
tanned by dissolving common pipe clay in boil
(, lug hydrochloric acid. and using tia cleay
LIQUOR undilutsd. Similar deposits may be
obtained from q strong aqueous solution O!
acetate Of alumina, and from common alum
but more slowly.
- - = i. -