The average annual output of the Institute is: 
16,000 sq. km. for the map of France to a scale of 
1:20,000 
15,000 sq. km. for the map of North Africa, 
1:50,000 
100,000 sq. km. for the map of the French Union, 
1:50,000 and 1:100,000 
Representatives 
B. Dubuisson 
R. Challine 
Exhibit 
A panel display illustrates the topographic activities 
of this organization, which makes large-scale plani- 
metric maps for urban and planning purposes. 
Kodak — Pathé 
This display shows the parts reserved for the admin 
istrative section and the private section in the work- 
37 avenue Montaigne, Paris 8°, France 
ing out of these maps. The most modern equipment 
for metrophotography, such as photographic apparatus 
with registration of the vertical, automatic rectifiers, 
Exhibit 
and metro-plotting instruments, are placed at the 
disposal of these users in order to obtain rapid pro- 
A panel 2X1.5 m. showing photographs and films 
bearing upon aerial photography. 
duction and results of high quality. 
Activities and Products 
Activities and Products 
M. R. L. is the French governmental organization 
Equipment and supplies for photography, radiography, 
cinematography, reproduction of documents, sound 
recording, cameras, studio equipment, chemicals. 
For photogravimetry: Aviation SXX-Tri-X film, Ekta 
chrome Aero film, photographic papers of all kinds. 
responsible for planning, construction, and housing. 
SOM Société d’Optique et de Mécanique 
de Haute Précision 
125 Boulevard Davout, Paris XX 0 , France 
Le Ministère de la Reconstruction 
et du Logement 
Representatives 
E. Torquebiau 
J. Baboz 
Avenue du Parc de Passy, Paris, France 
F. Dillard 
19 
Exhibit 
ington Congress in 1952, with aerial, terrestrial, and 
Poivilliers-SOM aerial cameras for 19X19 cm. plates 
and 19 cm. film 
Poivilliers-SOM plotting instruments 
Photogoniometer 
Geodetic and topographie instruments 
hydrographic stereophotogrammetry in scales from 
1:20,000 to 1:200. Detailed information is given on the 
exposed material. 
Activities and Products 
Activities and Products 
Société Française de Stéréotopographie is a joint- 
stock company, founded in 1920. SFS does mapping 
The Société d’Optique et de Mécanique de Haute 
Précision (SOM) employs 1200 persons in three fac 
tories with total floor space of 25,000 square metres. 
projects to all scales, with aerial and terrestrial stereo 
photogrammetry, in France, in all parts of the French 
Union, and in foreign countries. The equipment in 
cludes modern precision cameras and stereo plotters 
Its principal products are: 
Instruments for photogrammetry and topography 
Military optical instruments 
SOM-BERTHIOT lenses for still and cinemaphoto- 
graphy for professionals and amateurs 
SOM-CHR hydraulic control equipment 
of various types and makes. 
5. Bausch & Lomb Optical Co. 
838 St. Paul Street, Rochester 2, N.Y., U.S.A. 
Société Française de Stéréotopographie 
57, rue Pierre Charron, Paris 8°, France 
Representatives 
B. Shone 
P. Bergmanson, Aga Bausch & Lomb AB, Stockholm 
Representatives 
A. Schlumberger 
P. de Fontguyon 
R. Vincent 
J. J. Schlumberger 
Exhibit 
The Balplex Plotter is a complete mapping unit for 
transforming vertical, oblique, and convergent aerial 
photographs into topographic maps. It consists of two 
Exhibit 
projectors incorporating the design of R. K. Bean, 
U. S. Geological Survey, supporting stand, tracing 
Topographie contour maps surveyed, since the Wash- 
table with control for semi-automatic balancing of