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hg
een een
rt
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EER OTE ETS
ain
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itnpt
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eee
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i
tae me Oo ee A ee Mat ne eat ERom cent ME Sethn edn amen ae Fo
| Figure 3,12
canton tetanic
Initial portion of a pressure versus time record,
showing the improvement after modification. Shot 4,
A
Station 124.02,
Calibration Step:
7.5 psi
ight c ae MOOT AT EQ
At
AAR
“ee
eee
Lfis
La
r
fAyo
°
‘SSyS
Li
ee,
~~ PS
‘a *
erie
Hf
Bo PON AE
wage
.
POS (abt
i
2
v4
a
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é
|
5
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Weed Poy
x}
pve
mG
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oe
7
7
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ee Re
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Figure 3.13
-
an
i
we
{
t
$
*
Bree a
% Pe
fF
vig
*
Microscope with=f: attachment and projector.
ge
used to project the image on a ground-¢lass
and ground glass screen from a 4 x 5 camera
¥iewer.
The film holder
yes modified to fit the
projection attachment (see Figure 3.15). I pthis manner photographs
were taken on a 4 x 5 film for detail study
nighpeas The calieans of multiple
bration steps on the enlarged records were put o n
exposures, All of the record except the base lin th blanked off and
exposed. After exposure the record holder was moya¢
(a he proper disthe calibration
tance in mils to represent a particular pressure
41