Stand 110—cont. 
Stand 109—cont. 
small-scale mapping. Residual distortion, and the effects of earth curvature 
and atmospheric refraction for the altitude of the photographic flight are 
eliminated by the use of correction plates in the diapositive printer. 
Displayed with the small (28 in. x 28 in.) plotting table and provided with 
contact mechanisms for connexion to the EK 3 Coordinate Printer. A 
small plotting table can be supplied which stands at an angle to the 
Autograph, nearer to the operator’s chair. Any of the three tables shown 
with the A7, A8 and A9*can be supplied with any of these Autographs. 
WILD 58 Allograph. A new small cartographic instrument with rigorous 
geometrical solution, for plotting from wide-angle and super-wide angle 
photography of up to 9 in.x9 in. format. This new one-operator plotter 
is normally equipped with an attached table and a pantograph of new 
design, for enlargement or reduction from the direct plotting: table and 
pantograph are not displayed because of lack of sufficient space. Designed 
primarily for small- and medium-scale work, this instrument forms an 
economical addition to the A7, A8 and A9 Autographs and the STK 1 
Stereocomparator for detail plotting, being of moderate price and high 
accuracy. Residual distortion in the photographic camera, and the 
effects of earth curvature and atmospheric refraction, if not eliminated in 
the diapositive printing process, can be corrected for by the use of correc 
tion plates in the B8. 
WILD B9 Allograph. A new small cartographic instrument incorporating 
the rigorous geometrical solution for plotting from reduced-size (4-5 in. x 
4-5 in.) diapositives of super-wide-angle photographs. Designed for small- 
scale mapping, the B9 is for economical detail plotting from the pictures 
used for aerotriangulation in the A9. The plotting is done either directly at 
the tracing table, or alongside, using a reduction pantograph. Residual 
distortion of the photographic camera, plus the effects of earth curvature 
and atmospheric refraction, are eliminated by using correction plates in 
the diapositive printer. 
WILD STK 1 Stereocomparator. For precision measurement and auto 
matic recording (by means of the EK 4 Electric Coordinate Printer) of 
rectangular picture coordinates and coordinate differences in stereoscopic 
pairs for analytical determination of the outer orientation of aerial photo 
graphs and of the ground coordinates of the photographed area. This 
instrument is used in aerial photogrammetry, physics, astronomy, ballistic 
engineering and many other branches of applied science. Coordinates 
are recorded to two microns, but can be read to one micron on the dials. 
Geodetic Instruments 
Several WILD Theodolites are exhibited. These are the T4 Universal 
Instrument, the famous T3, T2 and T16 Theodolites, the TIA with new 
automatic vertical collimation, and the TO Compass Theodolite; and 
also the RDH and RDS Reduction Tacheometers for horizontal and 
vertical staff, respectively. 
3 25 
Stand 109 —cont. 
The WILD P 30 Phototheodolite is displayed. This is for terrestrial photo- ¡7» 
grammetry: a combination of the famous WILD T2 Theodolite reading 
directly to 1 in. and a tilting camera with the new Compur shutter for plate 
size 3-9 in. x 5-9 in.; f = 6| in. 
Four WILD Levels, which cover all levelling requirements, are shown 
together with various staves; also the TM 10 Rangefinder (50 cm. or 19-7 in. 
base), and the DL 1 Roof Plummet, for measurement of the amount of 
roof projection beyond the foundations of buildings. 
In the exhibit there are many accessories to the instruments mentioned 
above. 
Microscopes 
Several models of WILD microscopes have been adapted especially for 
photo-interpretation purposes. On show are the M4 and M5 Stereo 
microscopes, and two different models of the M5 Special USA Stereo 
microscope. 
Activities 
WILD Heerbrugg Ltd manufacture optical instruments for precision 
measurements in photogrammetry, surveying and microscopy, and for 
military, industrial and laboratory purposes. Certain mechanical and 
electro-mechanical instruments, for example drawing sets and the SL 15 
Tape Punch, are included in our production programme, these being 
essential accessories for the recording of measurements. 
The WILD factory, which has produced many thousands of fine modern 
instruments since it was established forty years ago, is situated in the 
beautiful rural surroundings of the Rhine Valley in north-east Switzerland. 
Decca Navigator Company Limited 
9 Albert Embankment, London S.E.ll 
Representatives: H. H. B. Capes J. M. Thomson 
C. Powell W. St. J. White 
STAND 110 
Examination Hall 
Gordon Square 
Third Floor 
Exhibit 
Decca Navigator survey equipment. Comprising units of the transmitting 
stations, together with marine and airborne receivers and automatic 
plotters. 
Decca “Lambda” hydrographic survey equipment. Comprising shipborne 
installation and units of the shore-based transmitting station. 
Decca “Hi-Fix” survey equipment. Comprising a transmitting station, a 
receiver and an indicator unit. 
26 
EXHIBITION GUIDE