Fort Worth weekly gazette. [volume] (Fort Worth, Tex.) 1882-1891, 1888-03-16

very thick and the sound Of the crack not
heard In minute or so, O dash of cold
water outside will settle the business.
The Electrical World calls the attention
OF builders to the economy Of the electric
motor in the erection Of the new capitol
building at Topeka, Kan. Several Sprague
motors are here employed for the purpose
OF hosting the heavy blocks of GRANTEE
brick, mortar, etc. One of the motor plants
is situated in the second stofF OF
the building. Another motor is Gttacssd
to 5 travelling derrick, and easily hsHdles
granite blocks weighing eight tenes The
current is furnished from th5 HdfsSRcir-
cults, and as the power is oE5sS used 81
comparatively long intervals be cost of
operating the motors is but small COM
psred with steam. @ss,.,.a,st
Mr.. Mayall, Loudon photographer,
claims to have perfected 9 system Of pho.
Biography in colors. He takes 8 negative
on = specially sensitized plate; from this
8 positive is produced on q chemically
treated basis by the aid of solar camera
snd spectroscopic arrangement. The
image is produced in colors on the
basis without the aid of hand
work or brush. The colors are
said to be al hydrocarbons, specially pre-
pared and capable Of subdivision to the
$50 millionth Of an inch. When the COL
ored picture Is produced by chemical
action the image exists between two films
not more than the hundredth part OF su
inch IN thickness. These photographs
are said to be permanent and not affected
by climate.
Hogyes, Of Budo-Pesth, has published
in the OrVosi Hetilap on account of SEINE
researches he has made on the protection
Of dogs from rabies by somewhat simpler
method than that employed by Pasteur.
He, too, makes use of the spinal cord of
an infected rabbit, but instead of drying
it to gradually increasing extent to OBJ
tain various degrees Of activity he merely
rubs 1t up with water containing
chloride OF sodium so as to make solu-
tons varying in strength from one-tenth
to one five thoussndth. The dog to be
protected is injected successfully with
these, beginning with the we.kest. The
results appeared to be quite satisfactory,
and q complete immunity from rabies
to be secured by six Of these Injections.
Lancet.
There is much mysterious talk OF bal
loon invention Of NJ. de VilIsrs, in which
the problem Of aerial navigation is said to
have been solved, at least q degree never
yet reached. NJ. de Yillars' aim has been
to direct his balloon by taking ad-
vantage OF the several sir currents
which are to be met with st various
heights. To do this it is necessary to
ascend and descend frequently in the
course Of the voyage. But with balloons
OF ordinary construction this is
impossible. by reason OF the loss
OF gas and ballast which
such maneuVers occasion. NJ. de
Villsrs has no ballast to throw away,
and he is able to retain the whole of his
gas. Herein lies the invention, which is
kept profound secret. The inventor, it
is said, has sold his secret to the French
government, to be used By it alone.
Americans of the middle and upper
classes-i. e., those who can afford
to get their lives insured -are healthier
and longer lived than Englishmen. |
Such is the result arrived at from
study OF the life insurance
statistics Of both countries cover
ing the period of years since
1873. At 20 the expectation OF life of
Am rlcan males is Al years, OF English |
males, 4l.1 of American females is at
40.s years, which is precisely the same as
that OF English women. After the age OF |
20 the expectation of life among American !
women slightly exceeds that of En-
glish women up to the age Of forty-seven.
After the age Of thirty. five the expecta-
ton of English women is better than that |
OF English men, but in America women
have a GO lower expectation rate than
men.
The Manufacturers Gazette gives the
following formula for making a violet |
copying ink: "Dissolve 40 parts of
extract of logwood, OF oxalic acid !
and 80 parts Of sulphate of aluminium,
without heat, in SOC parts of distilled |
water and ten parts of glycerine; let
stand about four hours; then add q solu-
ton of five parts of bichromate OF potas-
SUM in 100 parts OF distilled water,
and again set aside for twenty |
four hours. Now raise the mix |
ture once to boiling in 8 bright |
copper boiler, mix with it while hot
30 parts Of wood vinegar, and when cold |
put into bottles. After fortnight decaut |
1t from the sediment. In thin layers this |
Ink is reddish violet; II writes dark violet |
and furnishes blush violet copies"