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COMMITTEE II 
Plotting Machines and Instruments — Plotting instruments, devices, construc 
tion and operation; techniques for obtaining measurements or plotting maps 
from photographs; standardized test and performance measurements. 
President: Dr. G. Poivilliers, France 
Secretary: Mr. M. R. Daniel, France 
First Session, Thursday 4 September 3.20—5.10 
Considerations On the Poivilliers — S.O.M. Material and Its Facility For 
Adoption In Works Of High Precision — Dr. G. Poivilliers — France. 
The Restitution Apparatus For Rectified Trimetrogon Obliques — The 
National Geographic Institute — France. 
News About German Photogrammetric Instruments — Dr. M. Schwidefsky — 
Germany. 
The Nistri Photostereograph, Model В — Dr. Giovanni Boaga — Italy. 
The Optico-Mechanic Conduction Of Homologous Lines of Sight In The 
Nistri Photostereograph, Model B. — Major Luigi Ronca — Italy. 
The New Nistri Photocartograph — Mr. Umberto Nistri — Italy. 
Orientation For Construction Of Photogrammetric Restitution Apparatus — 
Dr. Ermengildo Santoni — Italy. 
Use Of The Kelsh Plotter — Mr. Harry T. Kelsh — U.S.A. 
Remarks On The Pennington Proposal For A Standard Test Of Plotting 
Instruments — Prof. W. Schermerhorn — Netherlands. 
Second Session, Saturday, 6 September, 1952 3.10—5.10 
Graphic Method Of Forming The Plastic Image — Dr. G. Poivilliers — France. 
Influence Of Instrument Error On Accuracy Of Plotting And Methods Of 
Orientation — Dr. Richard Finsterwalder — Germany. 
New Methods Of Tilt Determination — Dr. J. Sutor — Germany. 
Some New Geometric Knowledge On Vertical Photographs — Dr. J. Sutor — 
Germany. 
The Critical Surfaces In The Photogrammetric Cardinal Problem — Dr. Whi 
ther Hoffman — Germany. 
Convergent Photography — Mr. M. A. Radlinski — U.S.A. 
Stereoscopic Mapping With The U.S. Coast And Geodetic Survey Nine Lens 
Camera — Mr. William D. Harris — U.S.A. 
New Photogrammetric Wild Plotters — Dr. H. Kasper — Switzerland. 
Third Session, Tuesday 9 September, 1952 3.20—5.00 
Stereo-Maps — Dr. A. Frey Samsioe — Sweden and Dr. Percy H. Tham — 
Sweden. 
Some Aspects Of Photogrammetry In Great Britain — Mr. J. A. Eden — 
England. 
Application Of Photogrammetry In Plotting Roads In Tropical Countries — 
Mr. B. Scherpbier — Netherlands. 
Photographic Reproduction As The Intermediary Between Picture Taking And 
Restitution — Mr. M. G. Parenti — Italy. 
The Map Of The Grand Duchy Of Luxembourg — The National Geographic 
Institute — France. 
Photogrammetry at The National Geographic Institute of France.