Morris tribune. [volume] (Morris, Minn.) 1880-2000, 1899-08-26

which buckets on Oh pANOoS O0&
raise it to pipe leading back to tn
upper bowl. To minimize the use 9
mercury, each basin is nearly hilet
with cement. YET the value OF the pre-
cious liquid required to cover tn
surface of the basins and keep thu
fountain in operation is nearly 5000
Under the electric light, the spray o
quicksilver, falling at the rate O
seven tons an hour, is fairy-like anc
brilliant.
j.
The slate substitute of MIR. h
Miller. of Gloucester, England, il
adapted for great variety of articles
and consists of powdered slate with 9
varn1sh of boiled oil. ssphaltum, gum
arabic and resin. The hot compost
ton is forced into molds under great
pressure. The articles are then ex-
posed to the air for a few days, then
moderately heated, and finally kept
It 18OoF. for ten to fourteen days.
The material can be painted or pol
she'd like natural slate.
A house in Italy that was struck by
lightning last April has yielded DR..
Folgheraiter some interesting facts
The lightning produced large num-
Der of magnetic points and zones in
The masonry, amply proving that
lightning may independently yield
marked magnetization, and that
points may be SO formed in
tufa.
A concrete of remarkable strength,
described by Mr.. James Christie, NJ.
Am. Soc. G. E., has the following
composition: Cement motar, l part;
flag or broken stone, 4; cast-iron cut
tings, 2; sal smmoniac, l Id. for every
50 lbs. of iron. This concrete, weigh
ing 21O to 22O lbs. per cubic foot, will
stand crushing load Of 5000 lbs. per
square inch after four months, and is
about half as strong if the sal am
moniac is omitted.
n
An important branch of marine en-
yet in its infancy but des-
lined soon to achieve new
wonders, has been brought to the
notice of the British Institution of
Naval Architects b. Mr.. Fl. f. Swan.
This is the use of ice breaking YES
'els, an idea whose germ may be
raced to small single-screw tug
hat had its bow altered for breaking
hin ice at the port of Cronstadt.
The first specially constructed ice
breaker was vessel of 800 indicated
horsepower, built in 1871 for service
IN the Elbe at Hamburg; and this
vas SO satisfactory that it was fol-
owed by others of greater size and
md power, which now keep naviga-
ion open throughout the winter.
[ce- breakers Of various designs were
loon adopted for scandinavian ports.
The Americans, using ferry steamers
capable of breaking ice two feet thick,
discovered accidentally the sdvan-
age of bow propeller, and in 1898
quilt the St. Marie, the first vessel
With such propeller. Another i'm
stride was made last year in
he Ermack. built for the Russian
This vessel is of 5000
:ons displacement and 10000 indica-
ed horsepower, has three propellers
aft and one forward, and is fully
;hree times as powerful as any earlier
ce-bresker. This has been forced
through pack ice thirty-fcur feet
thick and has been driven at speed
Of ten knots through solid ice two
feet thick. Last winter it. liberated
thirty three valuable steamers that.
that were in great jeopardy at Rsval,
and enabled about forty others to-
reach Cronstadt and st. Peterbarg
several weeks before the usual open
ing of navigation. Ice-breaking
ferrysteamers near Saratoff on the
Volga, where the ice reaches three
feet in thickness, have maintained
railway service for three seasons with
out days interruption; while an ice