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the displacements of stones in function of their 
velocity and the place of their falling were determined. 
The second group of aplica'tions is concerned 
with the measurement of ojects which are deformed 
in long time. The typical example is the determination 
of the abrasion of steep banks of rivers and artificial 
water reservoirs /9/. The photographs were taken every 
6 months by terrestrial or air cameras. According to 
the width of a given water reservoir camera stations 
were chosen either on the oposite shore or on a floating 
barge and the approximate elements of camera orientation 
were estimated. Control points and the level of water 
were determined by a geodetic method. The graphical- 
numerical elaboration /plan in 1 : 2 C 0 and many cross sec 
tions/ were carried out on the universal autograph and 
it made the better recognition of the-abrasion possible. 
The economical aspects of this group of aplications 
/particularly speedy processes/ is the fact that only 
photogrammetric method can be used. Therefore obtaining 
any metric data is significant in practise because 
only then comparison of the theoretical and practical 
Parameters may be done. Additional, photogrammetric 
methods provide the continuous registation of the 
entire process and possibility o£ recording a large 
area in a very short time. 
2 . 6 . The endurance examination 
Photogrammetry is also applied to the recording 
of critical moments and determination of - extremal 
* strenghts which destroy the building materials. There 
will be presented the determination of the endurance 
of,power line pilars / 12 / and laboratorial concrete sam 
ple as examples. The building materials were loaded by 
weights up to destruction. The successive states in 
the positions of the pillar /loaded by increased 
weights/ were taken on the same phocograph in the 
night. The edges of the pillars had been painted