The Bossier banner., 1892-03-10
SCIENCE AND INDUSTRY.

value IN the construction OF sounding
boards 1t seems possible from its free /
dom from the metallic tone-co1or to inn;
prove very much the quality of the tone
of the phonograph, by getting rid of
the metallic sound so offensive to the
ear.
1T is said that half the ti11 Of the
world is exported from the Malay Pc
ninsula, where mining is carried on al
most exclusively by the Chinese. The |
mining is that of flood tin, and the |
metal is taken from the lowlands near |
the mountains, where it is found in
pockets ten to twenty feet or more be-
low the surface.
The length of the structure over the
Mississippi at Memphis is to be 5000
feet-bridge, 1900. iron viaduct, $500
feet; timber trestle, 3,1OO feet. Its eight
piers are to be III to 1877 feet in height.
The deepest foundation is 131 feet be-
low low water mark. The central span
is to he 62l feet in length, with canti-
lever arms 169 feet in length.
1t has been proposed that the car
bonic acid gas that is liberated during
| the process of fermentation In brew
cries be utilized by eondensing it into a
| liquid form that can be sold for eight
cents a pound. 1t is estimated that
25, 900, 900, 900 gallons of this gas are
produced annually in the breweries of
Great Britain.
Chlorine in water indicates pollu.
ton. The state board of health OF
| Massachusetts has sent out map show
ing the normal amount of chlorine in
the water supply throughout the state
If in the future the chlorine exceeds the
normal, 1t is, with some limitations, to
be considered as an indication that the
water has been polluted by sewage or
household waste.
An interesting archaeological dis
covcry has just been made in the forest
of Eawy, near Saint-Saens The exca-
vations undertaken by Mr.. CASTOR lie
Breton have recently brought to light
the walls of building seeming to be
the remains of little antique temple
belonging to the second or third CEN
tury. 1t is quadrangular in form, and
stands completely alone Among the
debris they have found some statues of
the Venus Anadyomene in baked earth.
Paris La Nature.
German scientists, who have re-
Gently investigated the subject, assert
that the heart of the oak begins to de-
cay at the age of 800 years. The pine
| tree lives to the average age of 800 but
some of them have fiourished for 7Jf
: years. They assign 425 years to the
: silver fir, 275 years to the larch, 24;
? | . 20 lo
t 200 to the birch, 179 to the ash, 145 te
the alder, and 130 to the elm.
l Contrary to the general belief tina
5 the dragon fly is dangerous and has ;
4 vicious sting, Prof. Bickmore says tina
it is not only harmless but good frien'
e to man, because it skins over the stag
S nant pools and quiet lakes where mos
n uuitoes breed, and eats them. Some eX
periments had been made to ascertain
!. if dragon flies could not be bred in sutfi
It cient numbers to completely cxterm
v nate the mosquito, but they had no
It been successful.
e Iowa, 331, 562, 900 bushels of corr
s Illinois, 241, orc 900; Missouri, POI, 176, ,00(
u Kansas, 16S, 1868, 900; Nebraska, AS, ,004
r 900; Indiana. 1l6, 490, 900; Ohio, 90, ,230
e 900; Texas, %, 122, 600; Kentucky, Sc
II O40, 0,COo, and Tennessee, Sf,S24, 600, al
n the ten leading corn-growing states a
d cording to the estimates of the depar
g ment of agriculture. Iowa is also at tn
r, head of the list in point of averag
weld, her rate being 36.7 bushels p'
20 acre; Ohio's average is placed at 33.
,r Indiana's 30, Illinois 31.2, Missouri
29.9, Kansas 267, Nebraska's 36.3