The San Juan islander. [volume] (Friday Harbor, Wash.) 1898-1914, 1902-10-23
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garlic juice, lnnaieu unueT Ceieuih
conditions, is the remedy with which
DR.. W. c.. Uinchin. of Kells. Ireland.
claims to have cured advanced tuber-
culosis.
The oxy-acetylene blowpipe of M.
Fouche. easily melting most metals,
burns a mixture of one part of acety-
lene to 1.S of soxygen. Explosion In
the blowpipe is prevented by moder-
ate pressure.
The latest development of screw pro-
pellers is due to G. A. Parsons. The
blades are given reduced pitch toward
their tips, small vanes being also pro-
vided ON the propeller-cone, and the
effect is to admit of high speed with
out cavitation, and to give a greater
mean thrust than is possible with
blades of constant or increasing pitch.
A British engineers new device for
steering twin-screw steamships con-
sists of a special throttle valve at
tached to each set of engines, the
valves being connected to a tiller by
bell cranks and linkwork. When the
! tiller is moved either way from lts
central position. one throttle valve re-
duces the steam of it's set Of engines,
diminishing the speed Of its screw to
a degree varying with that of the turn
ing Of the tiller.
Near Quebec a railroad bridge across
the st. Lawrence River is about to be
constructed with the longest single
span of any bridge yet in existence.
1t is of the cantilever construction. and
the length Of the great channel span
over the river will be 1880 feet. more
by 200 feet than the span of the Brook
Ign suspension bridge, and by 100 feet
the chief span Of the celebrated Forth
bridge in Scotland The towers will
rise 800 feet above the high-tide level
Of the river. Two railroad tracks and
two electric railway tracks, besides
roads for wagons, will be included on
the bridge.
1t is an interesting fact that the old
University of Heidelberg has within
recent years taken the lead Of all other
centers Of astronomical observation In
the discovery of asteroids, or minor
planets. OF the thirty-six new aste-
roids found in 1901 all but one were
discovered at Heidelberg. The photo
graphic plate has entirely superseded
the human eye in these discoveries.
This fact Is mainly due to the extreme
faintness Of the asteroids that are now
being picked up. DR.. Bauschinger esti-
mates that very few Of these bodies
brighter than the tenth magnitude re-
main to be discovered, but the number
Of fainter ones shows no signs Of ex-
haustion.
A novel experiment lately shown the
London Royal Society by T. G. Porter
was performed with a little water In
a beaker having nearly vertical sides.
When the water was rotated about a
vertical axis, the pressure was least
in the center and increased outward.
and when near boiling point and heat
was applied, steam formed only In the
region of least pressure producing a
gaseous core. The rotation was set up
by stirring with a rubber-cOvered glass
rod. Curious Phenomena were SHOWN
by the column of steam when the wa
ter was first stirred and allowed to
come to rest while still being heated.
the water at first having a concave
surface and the core Of steam being
practically continuous from bottom to
top. This was followed by stage Of
perplexing pulsations. Some forms Of
the steam columns resembled solar
prominences. and it was suggested that
the latter might be due to diminished
pressure near the center of cyclones in
the suns atmosphere.