. . surveying with the velocity of light, 
ÀGÀ GEODIMETERS 
NASM-2A N ASM-3 
Bergstrand System 
The first firm in the world to produce the 
Geodimeter, AGA continues to be a foremost 
manufacturer of these precision geodetic instru 
ments. Many years of field experience are behind 
Base Line Measurements 
Triangulation 
Traverse 
Speed and accuracy are together the basis for tech 
nical progress and the AGA Geodimeters are de- 
the development of the present models — 
N ASM-2 A and NASM-3 — which are in 
extensive use all over the world wherever 
extremely accurate"' results are required for: 
Photogrammetry 
Mine Surveying 
Offshore Hydrography 
signed to meet these requirements under even the 
most extreme climatic and geographic conditions. 
For further information concerning these instruments, write to: 
SVENSKA AB GASACCUMULATOR (AGA) • STOCKHOLM-LIDINGO • Sweden 
(In U.S. A. write directly to: BERG & HEDSTROM, 1170 Broadway, NEW YORK, N.Y.) 
■' When measuring accurately taped base lines with the NASM-2 A, the agreement is within two parts per million.