The Colfax chronicle. [volume] (Colfax, Grant Parish, La.) 1877-1981, 1889-05-25
SCIENCE AND INDUSTRY.


-Cryolite for making candles Is
brought from Greenland. where Inn
portant and little known mining oper-
ations are carried on.
To the changed condition of YES
sells magnetism by induction during
lengthy voyage may be attributed tho
loss of more vessels than is usually
thought to be the case among maritime
men.
Portable electric lights, arranged
to hang on button of ones coat, and
with parabolic reflector to concentrate
the light, with storage batteries weigh
ing II pounds each. are made to enable
persons to read in railroad cars by
night.
The Paris Academy of Science has
been excited over a plant called colo
casia. This plant often exhibits a
trembling or vibrating motion without
any apparent cause, and as many as
100 or 120 vibrations have been OBJ
served in a single minute.
1t is believed that the oldest tim
Der in the world that has been used by
man is found in an Egyptian temple
which is known to be at least 1000
years old. The wood is in the form OF
ties, holding the end Of one stone to
another. The ties appear to have been
made of shittim wood or acacia
Acids in lubricating oils may be
detected by analysis in a laboratory.
or by putting the sample to be tested
in clear glass bottle with copper
wire running down through the cork.
air tight; stand the whole in a sunny
place for two or three weeks, and then,
on removal, If verdigris or green rust
appear on the copper. an acid is in the
oil.
The number of eggs hen may lay
has been estimated by German nat
uralist as follows: The ovary of her
contains about 600 embryo eggs, oil
which not moro than 20 are matured in
the first year. The second year pro-
duces 100; the third. 1856; the fourth
| ia; and in the following four years the
number decreases by 20 yearly. In the
ninth year only 10 eggs can be ex
pected.
-Quicksand is composed chiefly o
particles of mica mixed largely will
water. When particles of sand are
jagged and angular any weight press
| ing on them will crowd them together
until they are compacted into solo
mass. A sand composed of mica OF
soapstone, when sufficiently mixet
with water, seems incapable of suci
consolidation. and any heavy body will
displace them and sink until solid
bottom is reached.
| From time immemorial the practic,
of massage has been known to the Fl
jams, from whom the Samoans first
and then the Tongans, learned the art
The process consists in rubbing and
kneading the part. the operation beini
sometimes continued for hours; i
stimulates the circulation and relieve
pain. and is commonly used in abdomi
| udl QkSOth6Os no uobASC uOSOOIo ud "
great faith in massage, and 1t is Away
practiced by them.-London Medica
Recorder.
1T is common opinion that ma
chinery works with an exactness an
steadiness of movement not to be &C
quired by the laborer's hand. This
not really true. The workman can sui
his stroke to the needs OF the case as n
machine can do. and this is proved i
the trimming Of roofing-slates. Tn
splitting process is performed wit
great nicely by means OF chisels, Blu
the shaping is more remarkable, ant
can not be properly executed by an
who have not been trained to 1t frol
youth. The workman sits on a stoe
with q pad on one knee and ledge b
his side. He lays the slate on the pa
on his knee. and allowing the part I
be cut to rest on the ledge, strikes
with aheavy knife, and separates it In
stanteously with the greatest accuracy
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