17 
GV-17 
C) Natural science 
1) Physics 
Photogrammetry has been used to determine the speed and direction of the 
current outside a coast, according to a method reported to the VII Congress in 
Washington. Further work on determination of the shape of waves in water 
has been done. 
Literature: 
Prof. B. Hallert: Deformation measurements by photogrammetric methods. Photogrammetric 
Engineering, Dec. 1954. 
2) Metereology 
Experiments have been made on the measuring of clouds. For the photogra 
phic part a couple of phototheodolites were used for simultaneous exposures. 
The scope of the work was to gather experience from this type of photogramme 
tric measurements, and no reference was made to the metereologic side of the 
problem. 
3) Astronomy 
Photogrammetric methods are consistently used for routine measurements 
as reported to the VII Congress in Washington. Stellar distances are measured 
with the spectral photometer method at the Observatory in Saltsjobaden. 
D) Military applications 
1) Ballistics 
Ballistic measurements of common type are performed by the armed forces 
with ballistic phototheodolites and measurements in a stereocomparator. In 
cooperation with the Naval Administration, the Division of Photogrammetry 
(RIT) has performed pilot experiments with an ordinary phototheodolite to 
calculate the positions of anti-aircraft shells. 
2) Ordinary work on close range photogrammetry in first order stereoinstru 
ments is in use for military purpose. Also stereoscopic y-radiography is used. 
E) Medicine 
In this field the work reported at the VII Congress in Washington has been 
continued and some new problems have been treated. 
Literature: 
Dr. J. Adams-Ray: Photogrammetry and medical research. Photogrammetric Engineering Sept. 1953. 
1) Medicine and anthropology 
A stereocamera for medical research has been constructed and built at the 
Division of Photogrammetry (RIT) and it is in use at the Surgical Clinic Sera- 
fimerlasarettet. It consists of two symmetrically similar cameras mounted on a 
frame of steel tubes. Tessar lenses, f: 4.5, are mounted excentrically to the 
6.5 X 9 glass plates to permit the range of 0.3—1.0 m and large base ratio at