The Banner-Democrat. [volume] (Lake Providence, East Carroll Parish, La.) 1892-current, 1901-12-07
SCIENCE AND INDUSTRY.

II was the agricultural department
that started the present organized wa
On mosquitoes. and now 1t has starte'
one on the fly. A special form Of ira
has been devised, which It is believe,
will prove to be better than anything
yet tried and directions for making
are to be distributed throughout tn
country. The fly renders some servic
as scavenger. but 1t is so potent
factor In the spread Of disease that I
should be killed OF as far as possible.
Professor Simon Newcomb, In an ar
ticle published in McClure's Magazine
expresses doubts as to the realization
OF aerial navigation, unless some wa,
Of controlling gravity shall be discov
cred. The balloon is too bulky, tn,
flying rcesfsins on very small seal
may be iossible, but hardly on larg'
scale. weight offering an cbstacl,
which will increase with every add
ton to the size Of the machine, mort
rapidly than the propelling and sus'
tanning power can increase.
Messrs. Pollak and Virag. displayed
their new telegraphic apparatus at ths
Paris exhibition last year, they were
invited by the French government to
make experiments with 1t over the
lines between Paris and Lyons. On ac-
count Of the enormous expense, how
ever. the inventors declined the invita-
ton. Since that. time, however. they
have established a line of their OWE
from Buda-Pesth to Fiume
q distance of 375 miles, and have been
carrying out a series of tests with their
apparatus. A speed of 10000 words
per hour has been attained.
A distinguished English authority in
veterinary science suggests that the 70
bra be domesticated as beast of bur.
len in British East Africa and the
Uganda protectorate, where these ami.
mails are found In, great number i,
IS we'll known that they are immune
70 the poison of the terrible tsetse fly,
which horses and mules arc not, and
hat Of itself would be of inestimable
advantage. The adult zebra is domes-
icated with great difficulty, but there
would be little trouble in getting the
foung, and they might readily be
rained. They would be specially
adapted to army use in Africa and
ndia.
DR.. Calmette, the director of the
'asteur institute at Lille, and the dis
overer of curative serum for the
fleets Of snake bite, is said to have
'een severely bitten recently on the
land by a trignocephalus. Without de-
ay he gave himself an injection Of
lis anti-venom serum, but neverthe-
sss the nand swelled and acute fever
ct in; but by the afternoon Of the
anne day he was sufficiently recovered
i attend sitting of the conseil gener-
! of the department and on the fol-
owing day was perfectly well. DR..
'halmette has thus AFFORDED in his own
erson though Internationally, a con-
incing proof of the efficacy Of his rem
dy
A French scientific investigator be-
Ieves that he has discovered q fash. |
ght powder compound which is prac-
cally smokeless. The principle is to
eep the magnesia that is formed when
powder is exploded as
much as possible attached to heavy
distance that will not easily fly about |
nd which soon falls of it's own weight. |
substance suitable for this purpose
J found In the binoxid Of barium. At
ID heat this substance gives up half |
. oxygenA and supplies that neces-
NY for the rapid combustion Of the |
powder. AS the binozid
lust be kept from contact with the
II the flash powder is made up in col |
dion capsules. This is also con-
umed and its combustion adds to the
ltensity of the light developed. The
roportion Of smoke produced by fash |
ght powders of this description il
small as 10 percent compared with