static and dynamic weights / 5 /, /5/* All states of 
the targeted crane and of the control points 
/outside the crane/ were taken by highly convergent 
photographs. Spatial components of the deformation 
vectors were obtained by the comparison of the 
coordinates of the object points computed before 
and after loading the crane with the accuracy ca 
1-2 mm. 
The dynamical deformations of crane were obtained- 
on the base of photographs which were taken at 
night by a film camera fastened to the arm of crane* 
The light points were targeted on crane and the 
plane components of deformations in function of 
time were determined by single-photograph method 
/with the accuracy ca - 2 cm/i 
b/ the examination of prototype of the device for 
spraying dustry fertilizers from the plane 
/ 10 /. The speed of the displacements of'some grains 
.in a one-meter distance from the opening of the 
nozzle of device was measured* The photographs were 
taken at night by a stereometric camera* The object 
was illuminated by double flash lights and the 
second light was 1/2000 sec later. In This way» two 
successive images of the same displaced grain were 
registered on the same photograph. The time 
between the fi as kes of light was known and 
displacements of the grains were measured on the 
autograph. The initial velocity of dusty fertilizers 
were from 6 to 40 m/sec» 
c/ the determination of the density and geometry of 
current of chemical powder pulverized from the^ 
fire extinguisher. The successive phases of 
pulverized powder were taken by a nonmetric camera 
and then each photograph to the vertical plane 
was rectified* 
As it appersi the photogrammetric methods are 
the best for the precise examination of the proto 
types. As evidence of this it is euough to mention