New Ulm weekly review. [volume] (New Ulm, Minn.) 1878-1892, 1879-03-12
MECHANICAL AND SCIENTIFIC.

and handsome kind of copper, by cast
ing it under water, the metal being
highly heated and the water also being
hot. The result is beautiful rose.cof-
ored tint, which is not affected by ex-
posure to the atmosphere.
The microphone has been applied.
in conjunction with the telephone, to
the science of terreous meteorology, by
Prof. Rossi, with satisfactory results.
results. The shocks of earthquakes,
otherwise imperceptible, were regis
tered, and three distinct and periodical
classes of sound made out, though
their special origin and significance
must yet be established.
The Journal Of Chemistry says
there is no Nation in Europe so ad-
vanced in its methods of teaching agri-
culture as Italy. 1t possesses two high
schools of agriculture, school of for
estry. a school of horticulture, one of
viniculture, two veterinary schools, and
twenty-one secondary schools varying
in Importance and organization. but
which may be compared broadly with
similar French colleges. These insti-
buttons are largely subsidized, either by
the State or by the Province where they
are situated.
1t appears from y recent report On
the construction of the St. Gothard
Tunnel, that the irregularity of the
rock formations met with in the pros
ecution OF this great undertaking, has
disappeared, and that at the present
time the work is successfully progress
ing through regular strata. The oper-
alton on the south side is still through
gneiss, the average daily accomplish
ment being, as represented, about ten
feet; while on the north the work has
not yet penetrated through the SER
pentine- which the geologists have esq
timated IT, be but one-half of the thick
ness actually pierced-the rate of prog
ress in this rock being somewhat
slower
The relative advantages of steel
and iron for boilers have been the sub
ment. by which the superiority Of the
former. in respect to strength and
durability and the advantage in weight
has been clearly established; but its
claims to superior economy remarks
the Scientific American-.lo not seem
to have been So convincingly advocated
as to induce its substitution, in any
considerable degree, for iron. Most of
the users of boilers are ready to admit
that the steel boiler is more durable
and less liable to fracture and explosion
because of the homogeneity of the
metal, but they are not sufficiently as.
sured that these advantages Offset its
higher cost.
The new mode or operation of
metal working, recently perfected in
Paris, is giving very satisfactory re-
suits. This process is applicable to
iron, brass and zinc, and, without
any attempt to initiate wrought or cast
iron. combines the advantages of both,
and expresses itself simply and plainly
as cut work" The cutting of these
metals is effected by steam saw,
which affords the greatest facilities for
the conception and working out of the
most intricate and artistic designs.
The zinc work, it is believed, will stand
in other countries as at Paris the
effect of the weather without painting.
Already this method of cutting through
hard metals has been brought to such
completeness that by it can bc cut brass
and copper three inches thick, and
wrought iron one inch thick. The face
Of the work can be chased or engraved
according to any style that may be de-
sired, and with the best cflcct.-N. r
Sun.