Evening star., 1909-07-15
PROGRESS OF THE DAY.

Electric signs are to be extensively
used on the stations Of the loop of the
Chicago elevated railroads. According
10 the plans OF large sign reading 'Ele-
waited Stations" will be installed on the
elevated structures at the principal street
corners. Numerous smaller signs, read
ing ITO All Trains. will be installed a
the entrance to the elevated stations. and
at all other points where signs are de-
sired those of the electric type will be
made use of. After an extensive investi-
CATION into the matter il has been de-
cided by the officials OF this company
that the electric sign is the best for all
purposes.
The International office Of public hy-
giene recently established in Paris has
for It's principal object the gathering and
distribution OF Information concerning the
more serious epidemic diseases. particu-
.arlv cholera. plague and yellow fever.
The bureau is the outgroWth of agitation
begun in 1902: and the direct result of d
conference of representatives of various
countries held al Rome in December. 1901.
TEe governments represented included
Belgium. Brazil. Spain. the United States
rle French republic Great Britain and
Ireland Italy. the Netherlands. Portugal
R"umania. Russia. Switzerland and Egypt
and the agreement was ratified bv the
President and Senate OF the United States
February u, 1905.
The matter OF boiler scale is one which
+ + constant worry to every one vino is
responsible for the economical operation
o 2 boiler plant. and many are the at
ternpts which have been made to solve
Fhis problem. An exceedingly Simple
me; nod has been discovered bv Russian
engineer which consists Of adding a small
quantity Of linseed TO the boiler water
The linse"d j. put in the upper part of
z copper tank divided by horizontal
sieve OF fine mesh. and connected with the
hot water supply The resultnat deCoction
rlterS through the close meshed double
copper sieve 10 the lower part. and is fed
70 the boiler through the injector. The
shiny substance of the Solut on ATTACKS
every particle Of the forming scale which
does not adhere to the walls or the
boilers. and Is readily elected when the
boiler j. blown out the necessary amounr
pf EnSeed * stated TO be bout one halt
pound 10 every 1ushorSeDoaer Taking
thirty pounds Of steam as correspondjnv
10 one horsepower, the quantity OF lin
seed required would be about one-half
pound for every 20 gallons or feed water
The nited States in the matter Of
cement output leads all the countri,,
81 the world The figures. based on the
latest Year Tor which all the totals can
be obtained. are estimated as follows.
United states, S.i21.Oao tons: Ger
many, i.ouo.uop tons: England 3,Oo nm.
TONS y rance, '1b,uba tons, CanaG.
fa,se tons; Russia. .a0ep tons: Rel
Eium. 100000 tons: Denmark 800 ,,ou
tons. switzerland 2op,uuu tons: Austr,,
.oooh tons: Italy. 200 900 toms
sweden -o"'ooo tons, Japan. 15oaao
tons. Total. 1887 p0 tons 4ccep,iur
this total of i?.ooo.oOo tons per year
as representing the worlds output mis-
would be equivalent to 100 oOa 0o.,
barrels.
Western railroads are laying their cross
ings in solid concrete.
Concrete Is made from the refuse of
a soap mill at Calcutta.
The Arctic air Is very favorable for tho
transmission Of sound
The per cent collected by the French
government on all money bet on the
pari mutuel system in France yielded la st
~Aar X9 SS9.225