The Duluth rip-saw. [volume] (Duluth, Minn.) 1917-19??, 1918-07-13

COutdCt. j LIS very QTy dlT Will IoAS
all moisture from the skin as fast as
the skin produces it. 1t will take
moisture from the mucous membrane
of the nose, mouth and respiratory
tract, causing drying of the skin
and of those membranes so as to rem
der them fit for the spread of such
diseases as dry skin, throat trouble.
catarrh and colds.
Dryness of sair also requires a
higher temperature to give the same
sensation of warmth and comfort OBJ
tanned at a much lower degree in air
containing normal percentage OF
moisture. If a room at sc degrees
is not warm enough for any normal,
healthy pupil, the percentage of
moisture is too low. Not more coal,
but more water is needed.
Excessive humidity, on the other
hand, is undesirable, as it causes a
feeling Of intense discomfort, espe-
cially when accompanied by high
temperature, because of its effect in
lowering the evaporation from the
skin and therefore retarding the pro-
cess of heat removal from the body.
Excessive humidity will also be OBJ
jectionable on account Of excessive
condensation taking place and run
ming from the windows over wood
workand wall decorations. A humid
flying apparatus should, therefore,
have an utomatic control to keep the
relative humidity at so degrees.
H.B. STOWE SCHOOL.
Heating-The Stowe school, like
the Morgan Park and Lester Park,
has an airline system, except that 1t
has a steam and water Jet air ex-
hauster connected with the air line.
The air exhausted takes great
amount of steam, so much, in fact,
that it is not being used. This sys-
tenn, therefore, needs a proper air
pump.
.Ventilation-Heatin coils are i'm
properly proportional, giving too
high an air velocity.
Fresh air inlets for class rooms
are properly located and ducts are
adequate in size, being equipped
with volume hampers. These dam
pers should be adjusted so as to give
an equal air volume to all class
rooms.
An attempt has been made in this
school to drive an attic exhaust fan
by means of vertical shaft friction
drive from the basement. This ap-
paratus is a very poor piece of me-
chanical design as it has a very low
efficiency and it is impossible to op-
crate it without a great deal of
noise.
Both the Stowe and Morgan Park
schools are located in Industrial dis
tricts where more or less trouble will
be experienced with smoke being
drawn into the ventilating systems
through the fresh air intakes.
Schools in such districts should have
air washers installed to clean the air
of impurities. An air washer Is ex-
pensive to install and operate, but it
is an absolute necessity for proper
ventilation on smoky days. All
schools should at least have suffi-
cient space between the air intake
and the heating coils so that an air
washer could be installed If trouble
is experienced with smoke or fac
tory doors at any future date.
. The Stowe school toilet rooms
and auditorium are inadeduately
ventilated, in a manner similar to
that noted in the Lester Park school.
MUNGER SCHOOL.
The heating equipment Of the
Munger school is installed according
to good engineering practice.
The ventilating equipment is pro-
vided with no humidifying appa-
Volume hampers are properly in
stalled.
The toilet vents have no mechan-
'ical exhaust.
The air supply ducts and vents to
the class rooms are of adequate size.
Their location at the ends of the
room is not as desirable as If placed
opposite the windows. The peculiar
architectural arrangement of this
school, however, would not permit of
a proper arrangement Of ventilating
fans.
RECOMMENDATIONS.
1-Automatic electrical air pumps
should be installed on the air lines
of heating systems at Lester Park,
Morgan Park and Stowe schools.
2-Heating coils should be reap
portioned on Lester Park, Morgan
Park and Stowe schools.
3-Automatically controlled hu-
midifiers should be installed in all
schools.
A. Volume control hampers
should be installed and properly ad-
justed in fresh air supply to all class
rooms in Morgan ark and Lester
Park schools.
5-Fresh air supply ducts in cell
ing of class rooms of Lester Park
and Morgan Park schools should be
removed and a larger outlet made
just above the breathing line on the
wall, opposite the windows.
. 6-Proper wardrobe vents should
be installed in the Lester Park
school.
Room vents should be in
stalled In toilet rooms Of all schools
and electric exhaust fan connected
in the attic to all toilet room vent
stacks.
8-Locker rooms in Lester Park,
Morgan Park and Stowe Schools
should have vent stack installed and
connected to toilet room electric ex-
hauSt fanNin the attic