The Bossier banner., 1892-03-03
NUMBER /.
SCIENCE AND INDUSTRY.


light of the sun and the moon exercise
q deleterious effect on edge tools
Knives, drills, scythes and sickles as
sumo blue color if they are exposed
for some time to the light and heat OF
the sun; the sharp edge disappears and
the tool is rendered absolutely useless
until it is retempered.
On the estate of the Marquis de la
Laguna, in Spain, water wheel OF
twenty horse power runs dynamo.
Flowing by electricity has been propos-
ed, and the current is to be transmitted
to a field three miles distant, where
motor on plow is to be operated The
| cable to be attached to the plow is to be
wound on reel and drawn over the
| field.
Cyclones of grand dimensions are
generated in the zones where the trade
wind of the opposite hemisphere pene-
trates. They are caused by an aug
mentation or swelling in volume of air,
proceeding from the opposite hemi-
sphere, attending unequal distribution
of the normal limits of the atmospheric
circulation, and determined by the re-
tardation which the trade wind or mon
soon meets with in following the suns
movement.
Professor Won Pettenkofer has been
studying the Iser River, which flows
through Munich, carrying the citys
sewage. He says that five miles below
the city there is not trace of the pol
luton which finds it's way into the river.
Some observers have thought that the
| -. ic A1Hn To Ha,
position of sediment. DR.. Won Petten-
kofer, however, maintains that the real
agent at work in purifying the Iser
River is the oxygen of the air which is
absorbed by or dissolved in the water,
"A course ofsexperiments continued
through several years, in Germany, has
resulted in producing a breed of silk
worms that eat satisfy and thrive on it
as we'll as other breeds thrive on the
white mulberry. This will enable the
Germans to enter proftably upon silk
culture. AS the climate of our eastern
and middle states is about the same as
that of central and south Germany,
American agriculturists can avail them
selves of the result OF these expert
ments.
-Raisin raising and prune growing
are two comparatively new industries in
California that are attaining very large
proportions, and the domestic products
, have almost driven the foreign goods
from our markets During nine months
ending September So 1891, only ., $780,
735 pounds of raisns and $500, $50
pounds of prunes were imported, as
, against IL, 769, 056 pounds of raisins and
, S5, ,693, $50 pounds of prunes in the same
period of 1890. Four or five carloads OF
9 raisins are leaving San Diego daily for
9 the east at this time.
Some recent experiments in light
. house signalling in England haveshowr
: some remarkable results from directing
: the light vertically to the sky, instead
: of horizontally across the water Wher
A all weather conditions are favorable the
= light of the Eddystone lighthouse, as
ordinarily directed, can be seen seven
y teen and half miles at sea, but 1T wa;
: found that beam of light of much less
power directed vertically was visible
! exactly twice as far, and could be wei
= discerncd through an ordinary fog.
The number of locomotives in the
United States is about 80, 000-one II
:. every five miles of railroad, and of car
of all kinds 1,1O9, OOO of which 27,O0
~ are passenger coaches. The locomo
\, tives cost $3.50, 900, 900, the cars $500,
20 600, 900, making the approximate cost o
70 the rolling stock 81, 500, oOO 600. Fac
70 year freight engine hauls $4,000 tons
20 and a passenger engine pulls 5000
.. passengers. These railways emplo
- 725, 900 persons, nearly all men, VIII
,r provide living for nearly 100000
90 people, or about one-twentieth OF tn
or whole population.
- One of the theories with regard
- the so-called Druidical rocks at Stone
nd henge is, that they were erected wit
- an astronomical aim, and one OF tn
=. legends states that the sun rises on tn
a1 longest day of the year immediatel
30 90 above the top of an isolated monoiit
The latter statement has been prove
10 by Mr.. Bacon, who made trip there
~ the time of the last solstice, accor
Iat panied by Mr.. Howe, Photographic
who succeeded in getting fine view
the sun, as it rose above the point
'no the rock in the manner named by .
a' legend.