Evening star. [volume] (Washington, D.C.) 1854-1972, 1908-11-08

turn under the emery wheel. This emery
wheel has two motions; one a circular
motion and the other an oscillating mo-
ton, which enables the grinder to cut
one edge of the tooth and then the other.
This is accomplished by most ingenious
system of levers and cams. One of these
levers has a turnbuckle, by means OF
which any desired pitch can be given the
teeth. The emery wheel can be raised
OF lowered to suit the diameter of the
saw. The operation of this device is so
simple that saw can be keyed to the
shaft, adjusted. and the machine started
in remarkably short time; and when
once in operation no attention whatever
Is necessary.
In order to fully ascertain the efficiency
of new piece of STRENGTHENING appa-
ratus being experimental with in New
York, the street cleaning department con-
Quoted a number of meteorological tests
on streets before and after the passage
of the machine. The culture was made
up In an ordinary petri DISH three inches
In diameter, which was placed on a
small stand in the center of the street
and raised two feet above the pavement.
On top of the stand was an open gal
vanized iron box, about fifteen inches
square and four inches deep. In some
cases the dish was placed on top of the
inverted box, and in others placed be-
meath the inverted box, and in some
others placed inside the box when the
open side was up. The stand is made OF
small gas pipe. and arms extend out
from small square block of wood in
the center, so that when the box is in
verified and the dish placed beneath 1t air
has access on all sides, the box resting
on the extended arms. Each plate was
exposed for fifteen minutes and then al
lowed to stand at room temperature for
twenty-four hours for the colonies Of bac-
terra to develop. The colonies were then
of sufficient size to be counted without
the aid of a microscope. In one plate ex-
posed before cleaning the number of cul-
lures noted was 900 while on the plate
exposed afterward only 20 were found.
.Bion j. Arnold, an electrical transporta-
ton expert, has been looking over the
New York subway with the object of
suggesting means of increasing the ca
pacfty Of the line with the view of ade-
quately answering the demands made
upon it, This line has been overtaxed
from the first and the management was
at once confronted with the problem Of
handling larger crowds than the line
was meant to accommodate. Mr.. Arnold
has made his report. containing number
of suggestions which may offer some re-
lief, but the most interesting suggestion
contained Is for one to be considered in
the construction of future subways. and
that is for double-decked sta ions where
one floor will be devoted to the local
trains and the other to the express serv-
ice This will enable the trains to be
run Independently Of each other to a very
great extent. and 1t is stated will greatly
cut down the running time of all trains.
The plan offered calls for island plat
FORMS" one on each side of each train.
SO that passengers may enter the train
from one side while others are leaving at
the other side. These platforms are SO
ARRANGED that they will all lead to one
large platform or reservoir. where pas
sengers may be readily transferred.
The business OF the Chicago freight SUBJ
way has now reached point where the
financial loss, occasioned by the with
drawal of the government contract for
the carriage of mail matter, has been
overcome and the business of the COM
panJ Is said to be on a sound basis. The
action of the government officials was
based entirely on the fact that trans
portation could be made by horse and
wagon at a slightly lower cost, although
1t is contended that it is not SO safe or
satisfactory. The company has an ar
rangement with eleven of the railroads
entering the city for the transfer and
delivery OF freight. and while this does
not save the shipper from the cost Of
carriage to the receiving stations of the
tunnel company. 1t does save the shipper
the cost of transporting freight across
the city. which cost is exceedingly high
under the existing conditions The use
of the tunnel has thus not only already