1928 Cadillac - GM Heritage Center

22 CADILLAC OPERATOR'S MANUAL
that the victim may be overcome before he is aware of the danger. When
the engine exhausts into the open air, the carbon monoxide is so diluted
that it has no effect. It is when the engine is run for a time in a closed room
that the proportion of carbon monoxide in the air may increase to the point
at which continued breathing of it would be fatal. The United States Public
Health Service advises that the average automobile engine warming up in a
single-car garage will give off enough carbon monoxide in three minutes to
endanger life.
Proper precaution must be taken in cold weather when the natural tendency
is to keep the garage doors and windows closed. The practice of
letting the engine warm up in a closed garage before opening the doors is
unsafe. The risk is made greater by the fact that the enriching of the mixture
by manipulation of the carburetor enriching device increases the amount
of carbon monoxide formed.
CHAPTER III
EQUIPMENT
THE controls and instruments used in driving have already been described.
In addition to these, the car is equipped with various devices which are for
the convenience and comfort of the occupants, and are used only as occasion
demands. It is suggested that the driver anticipate his use of such equipment
by becoming familiar at once with the directions contained in this chapter.
Windshield and Ventilation
CLOSED CARS—Cadillac closed cars are equipped with a one-piece
windshield, which can be moved up and down. Movement of the glass
is controlled by a handle above the windshield. To raise the glass, the
handle should be turned clockwise, and to lower the glass, the handle
should be turned counter-clockwise.
For ventilation under the cowl, the windshield should be raised not
more than one inch, so that the lower edge of the glass is still below the
ledge over the instrument board. With the windshield in this position,
air is deflected into the driving compartment through an opening in the
cowl, just forward of the instrument board. If desired, the windshield
can be raised above the level of the ledge over the instrument board, and
air will then enter directly into the car. In this position, however, less
air will be forced down under the cowl. (Fig. 10.)
Figure 10. The closed car windshield has three positions: the position shown in the center
is best for warm weather.
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