Union gazette. [volume] (Corvallis, Benton County, Or.) 1899-1900, 1899-09-08
SC7gkSess%.SsSA j
sc sRg|hFgEe q
M AlM.sxM
UMWEEy 4 D01

The cooling Of the air continues until
condensation of the watery vapor be-
gins. Watery vapor Is always present
in greater or less quantities. The tenn
perature at which this condensation
takes place is the dew point, and If this
occurs at 80 degrees Fahrenheit, or
below, frost is formed.
A Frenchman has constructed a tri-
cycle for travelling on the water. The
wheels have immense rubber tires,
nearly four feet in diameter, which
when inflated, buoy the machine up
SO that, when the rider is in position.
the bottom Of the wheels dip hardly
more than foot beneath the surface.
Projections on the sides of the rear
tires serve as paddles to propel the
machine. AS it weighs less than 20
pounds, 1t can, when necessary. be rid
den on land.
Many people regard gold as of one
color; this is a mistake, as pure gold
varies considerably in hue. An expert
can tell the locality from whence 1t
was derived by its color. Australian
gold is very much redder than Califor-
nian. Nugget gold (Klondike, for in
stance) is yellow, whereas that from
quartz is of deeper golden" tint
The reddest gold comes from the Ural
Mountains. OF course few people see
pure gold, for the metal Of commerce
and even our coins are alloyed. Native
metal is much too soft to be used alone
and requires an alloy to enable it to
Withstand rough'wear and tear.
Astronomers are already looking for
ward with keen interest to the expect
ed temperance of the celebrated Le-
mold meteors next November These
meteors, whose temperance as a
great swarm occurs at Intervals of
about thirty-three years, made spec
tacular display in 1888, and were also
very numerous in 1866 and 1867. Re
cent calculations show that since the
swarm met the earth the last time it
has been perturbed by the attractions
of Jupiter and Saturn, and that the
middle of the shower this year will oc-
cur on the morning of Nov. 16, instead
Of the 14th. It win be visible in both
Europe and the United States.
A recent investigation in Germany
of the suitability of aluminium for cook
ing utensils raises the question wheth-
er any danger attends the use Of such
vessels. While aluminium is but slight
ly affected by weak acids when they
are pure, it is rapidly attacked in the
presence of sodium chloride by sulphur
dioxide, acetic acid and even alum.
But, says Science, 1t remains mooted
ed would do injury to the system. Ex-
periments made indicate that alumni
mum salts have somewhat detrimen-
tai effect on digestion; yet on the other
hand, alum water is often beneficial to
health.
The foot OF horse Is one Of the most
ingenious and unexampled pieces of
mechanism in animal structure. The
hoof contains series of vertical and
thin lainae of horn, amounting to about
500 and forming a complete lining to
1t. In this are fitted as many laminae
belonging to the coffin bone, while both
sets are elastic and adherent. The edge
of quire of paper. inserted leaf by
leaf into another, will convey a suffi-
cient idea of the arrangement Thus
the weight of the animal is supported
by as many elastic springs as there are
laminae in the feet, amounting to about
1000, distributed in the most secure
manner. since every spring is acted on
in an obl!Que direction.