The Baltimore County union. [volume] (Towsontown, Md.) 1865-1909, 1905-02-11

Go1Dou-De0p MiulnB-Ino Best EBH8-
Fresh Grapes All Winter-oun Erosion
Tin from Waste-Copper Paint for
ships.
Tho novel theory that the difference in the
color Of peoples eyes 4 protective adaptation
70 surroundings comes from Prof. Wallace. OF
Kimberley. south AfFica. Natives OF regions
where blue light Is predomlnant- swedes. Nor
wegians and sailors. for insfanco.-have blue
eyes. while near the equator. OF IN sandy lands
Ike South Africa where intense yellow light IL
experionced. the eyes take . rich dark yellow
hue. ~ lhose Of the Kafnu and Malays. Italians
aud npanIarda. Generally speaking. the Scotch
hare blue. the EngIish gray. and the French
dark oyca.
From experiments IN Belgium. Leon Thomas
gives roassuranco % jewellers . few miles away
from stores o. high explosives. Various quanti-
ties q dynamite up 20 ton were exploded. and
The destructive effects were confined to radli Of
20 to go feet. leading 70 the conclusion that the
greatest store Of explosives that could be col
locfed would not endanger life OF substantial
buildings beyond 100 TO 800 yards. Further
awag. up 70 so yards. an explosion would give
return shock. with no more serious injury than
broken windows or disiodged tiles.
sss
Ia the new process OF ID. Engels. carbon for
hardening iron and steel ls obtained from car
bides and certain nuxes. A mixture OF silicum
carbide and sodium sulphate. for example, is
atpiied TO the cold metal. and then heated to
redness with It. the reaction being SO rapid that
an eishth-inch steel plate Is made to resist the
best tempered steel tools on one side while the
other side remains wholly soft.
-
Last years hydrophobla statistics at the Berlin
institute show that of 2S1 persons inoculated at
once on being bitten by mad dog, TX per cent.
died; Of those treated medically, per cent. !;
and Of those not treated, II per cent.
80
Artificial cotton is now made from various
woods. as from pine in Bavaria and from FIR in
France. In the French process. the wood, freed
from bark and knots and pulverized by special
machine, is steamed ten hours in horizontal
brass lead-lined cylinder of $500 cubic feet ca
pacity, after which 1000 cubic feet of bisul-
plate of soda wash is added, and the whole is
heated thirty-six hours under a pressure of
three atmospheres. The f1ber thus made very
white. Is then washed and ground by series Of
strong metallic meshes. after which it is given
electro chemical bleaching by chloride Of lime.
The mass Is dried between two powerful rollers.
The resulting pure cellulose is relocated in a
tight metal boiler with mixture of chloride of
zinc and hydrochloric and nitric acids. to which
Is added little castor OIL cascin and gelatine to
give resistance to the fiber. The very consis-
tent paste produced is drawn into threads
through kind of drawplate. The threads are
passed over gummed cloth, then immersed in
weak carbonate of soda solution, dried between
two slowly turning cylinders, aud finally given
solidity by an ammoniacal bath.
-.
little more than mile in Cape Colony, and the
deepest bore-hole has reached about the same
depth in SiIesia. The Hon. G. A. Parsons con-
tends that there should be no insurmountable
difficulty in a shaft down twelve miles. An ap-
proximate estimate has shown that to reach a
depth of two miles the cost would be $2.5O0.O00
ten years would be required, and rock temper
allure OF 1929 would be found; while to pene-
trate twelve miles would cost S25.O00.0O0. and
would take eighty-fve years. the rock-tempera-
turo expected being s7s'.
-
Brown-eheIed eggs have been thought so much
better than white ones that the shells are now
aFtlnciaIly colored. recent medical writer.
however. declares that there IL probably no nu-
tritive difference between eggs naturally brown
and white, but that deep colored almost reddish,
yolks indicate richness in iron and eggs of much
yolks laid by anemic. town-kept hens.
sss
The curious new French method of preserving
grapes depends upon cutting so that FIVE or six
inches of vine is left attached to each fine
bunch. The piece of vine stem is inserted in
wide. mouthed bottle filled with water, and the
grapes hang outside without touching the bottle.
The bottles are placed on large racks in cellar.
where. water being supplied daily to replace
evaporation loss, choice table grapes are kept
fresh and perfect throughout the entire winter.
The process is expensive, but there are said to
be customers for the grapes at $500 or more
pound at certain times in the year.
81
Nitroglycerine powders are stated to have
combustion temperature above the fusing point
of STEEL This causes very rapid erosion of heavy
guns, for at each discharge thin layer of the
bore is actually fused and carried away. Nitro
cellulose compounds, such as are used by the
United States Government, have much lower
combustion temperature, American guns for
this reason being much less affected in action
than British guns.
The recovery of tin from old cans and scrap
plate has been a subject of much experiment,
and is already developing into an important in
dustry among the thrifty Germans. They now
treat waste tin plate at eight factories, by
electrolytic methods reducing $1,000 tons an
nually. Much old tin is sent from the United
States to Germany, and some years ago the price
of scrap tin in New York reached $500 a tom
Yet the scrap contains only 8X per cent. of tin.
80
A novel method Of giving an anti-fouling coat
ing to ships bottom is the subject of q recent
patent. Quick-drying paiut 10 first applied, then
copper powder is blown into it and the surface
is FURNISHED, after which the application Of stil
finer copper is continued until complete sur
face OF copper results.