Evening star. [volume] (Washington, D.C.) 1854-1972, 1909-02-14

fiexes its finger at a current generated
by simply reforming a drop OF mercury
so as 10 press it out Of a spherical shape
into that OF an egg.
The amount of work done by the wink
of an eye equals 100 600 600 900 of the
instrument. but even this performance IS
surpassed by the "coherers'' of Branley
OF Paris. by which the Hertz waves Of
wireless telegraphy are caught in their
pulsings through space.
The range of impressions which we get
from lifting an object is exceedingly
small; ordinary chemists balance is
some million times as sensitive and
weights down the two-hundredth part of
milligram. Without such instruments
as these we should know far less about
the world than they place within our
reach. They make 1t evident that our
sense organs give us reports of but a
comparatively small number OF compare
lively gross stimuli.
There have lately been added LOCO
acres to the reservation Of the Forest
Summer School of Yale University. at
Milford. Pa. Students of the scientific
school seeking advanced courses in for
estry must take extra scientific courses
in the senior year and pass two sessions
at the Forest Summer School. to which
seven new courses have been added.
An Austrian inventor appears to have
solved the problem OF the regulation Of
clocks by wireless telegraphy. which has
heret ofore been rendered difficult because
of the various disturbing influences in
the atmosphere. The central clock Of this
inventor sends a signal only once every
sixty seconds and the clocks to be con-
trolled are provided with apparatus which
Will receive the Hertzian waves for that
second only while for the remaining
tifty-nine they are unaffected by any
Hertzian waves. In case of a disturbance
during the one second when they are in
circuit with the receiver, the disturbing
wave may set the clock incorrectly, and
for the next minute 1t will be fraction
of second fast or slow. However. this
inaccuracy will be corrected by the mas
ter clock a minute later, when IT is again
placed in circuit with the receiving ap-
paratus.
Fourteen carloads of pumping ma
cninery were shipped at one time re-
Gently from large industrial plant in
quite notable event and the train was
sent off with ceremony. This mass of
machinery was only part of two install
lations which were made for the city OF
Antonio Tex The pump for the city Of
Chicago will be of the vertical. triple
expansion. condensinS crank and fly
wheel type, having three single acting
pumps of the direct now type. equipped
with automatic valves. The engine will
be entirely self-contained on the pump
chambers This unit is guaranteed to
develop a duty of 155. 100000 fooi pounds
OF work delivered by the pumps for each
100000 British thermal units used by
the engine and auxliaries, when pumping
continuously at the rate of $1,000 600 gal
Ions in twentyfour hours against a to-
tai head of $40 feet. The San Antonio
pump is practically a duplicate of the
one just described. The normal and eco
nomica rating will be 2OOO0.OOo gallons
per tWenty-four hours: but the pump is
guaranteed the unit to operate al the
rate of "a 100000 gallons per twenty four
hours 10 meet special excessive demands
for water as in case Of fire or extreme
hot and dry weather. without unduly
straining the engines or pumps.