you are saying and can result in a loss of continuity. The
following principles are involved:
. Motivate the audience to want to read the
material.
. Have a system for smooth distribution.
. Maintain contact and continuity.
The best time to distribute handouts is at the end of
the presentation, during which time you may ask for
questions. An alternate time for distribution is before
you begin your talk, provided the audience has been
previously motivated to recognize the value of the
material.
OPTICALLY PROJECTED AIDS
Optically projected aids include the opaque
projector, overhead transparency projector, videotapes
(and associated equipment) and the Carousel slide
projector.
Opaque Projector
The opaque projector (fig. 6-5) has two basic
applications. First, it can be used to project graphs,
photographs and other aids that are too small to be seen
but should be shown in their actual form to your
audience.
It may also be used for enlarging clippings, maps,
photographs and other items so they can be traced
proportionally correct and in complete detail. The
projector permits you to project an illustration or other
material out of a book without damaging the publication,
The “opaque” uses a 1,000-watt projection lamp
and is equipped with a 4 1/2-inch diameter, 22-inch focal
length lens. The projector comes with an opaque
object-holding device and a conveyor belt loading
mechanism that permits uninterrupted projection. It also
has an optical pointer that permits details anywhere on
the screen to be pointed out by a projected light spot.
The roll feed assembly provides a means for
handling opaque objects of any length up to 10 inches
wide. The thickness of the object should not exceed 1/32
of an inch.
To operate the roll feed assembly, stand behind the
projector and hold the crank knob in your right hand.
Hold the copy in the left hand, faceup, bottom edge
toward the screen and feed it into the left side of the
projector. When the material is inserted approximately
1 1/2 inches, turn the crank clockwise. The pressure
created by the impelled air holds the opaque object flat
on the feed belt. When the crank is turned, the opaque
object is carried into position. When the next opaque
object is to be inserted, repeat the operation. The
insertion of one opaque object automatically removes
the previous one.
Figure 6-5.-The opaque projector.
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