The mirror. (Stillwater, Minn.) 1894-1925, 1918-02-14
@ u e r. ES
NOTICE TO INMATES

~-~~~~~~~-o~-~~o-~~~~~ ~o~~~~-~~->o~o.o~~~~~c>
the appreciate
portuny that give
ing education
ton in connection with their
with be privileged to use the ouerv column You are welcomed to
queries YOURSELF
kind collaboration of Miss Miriam Institution
Libraries gladly endeayor supply the requested information
NOTICE-In regulate conduct
sign their name register number and lock number
to all queries submitted for publication Inmates of
will be published only querst
being used. (Ed.)
Q-Can give the approximate population
according to the racess -J.B
A:-Caucasian (whe) 770, O0O, 900
Monaghan yellow $4,000 900
Ethiopian and Malaysan (back and brown) u.s. OOO 900
Indian fred ------- %, OOO 900
otal---------------------- ,507. O0O, 900
Q:-a) What superheated steam, and how is it super
heaedi Q) How the degree of uperhea measued?-J.H.
A:-(a) 1t is steam that has been heated temperature
higher than that corresponding its PRESSURE that which it
would have in the boiler in which it generated.
The steam must be uperheaed in a chamber vessel in
which it removed from with boiler
If in with that water would
ately mpa its superheat and would ITSELF be reduced
the temperature of saturated
The method employed in experimenting steam locomotives
admission the cylinders through pipes exposed
the products of combustion.
(b) 1t is measured from the temperature of saturated
normal steam at existing in the boiler For example,
If the boiler working under pressure of 200 lbs per square
nch the temperature of the saturated would be 38 If
the be would have 0 of super
heat. be heated 5OO would have 113' of
superhea
OWL you kindly let know through THE MIRROR
what the divisions of time "A T. w.
AThe interval between two consecutive ansits of fixed
star meridian the interval during which
makes one absolute revolution its axis is called SdereaI
Day. and invariabe while the interval between
utve rans of the Sun meridian called Apparent
Solar Day. and its length varies from day by
the variable motion of the earth in its orbit and the inclination
of this orbit to the equator which time is measured
Mean Solar Day is the average of all the Appar-
Solar Days year. Mean Solar Time that shown by
we'll regulated clock watch, while Apparent Time
shown by well constructed sun-dia the difference between
the any time the Equation of Time and may
19 minutes and 81 seconds The Astronomical Day begins
and the Civil day the preceding midnight The
Sdeea and Mean Solar Days both nvarabe but day
of the latter equal day. minutes and 5e555 seconds of
the former.
The interval during which the makes absolute
revolution around the is called Sderea and consists
of 365 days. hours, minutes and SO seconds which
nvarabIe.
The Tropical Year the interval between consecutive
of the the vernal equinox If this fixed
point Sdeea and Tropical Years would be dentica but
in consequence of the disturbing influence of the and
planets the spheroda figure of the eah the equinox has
Slow retrograde motion of So 26 annually, that the
the equinox than otherwise
would by 20 minutes and 1916 seconds; the Tropical Year,
therefore, consists of 365 days. hours 4S minutes and 46
seconds The Tropical Year is of uniform length; it is
slowly decreasing the of 595 second per century,
but this variation will not always continue.