vertical staff, respectively. 
receiver and an indicator unit. 
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Stand 110—cont. 
Activities and Products 
Manufacture of the Decca Navigator radio navigational system for ships 
and aircraft; the Decca Lambda two-range system for hydrography and 
over-water geodetic measurements; and the Decca Hi-Fix miniature 
electronic surveying system. 
G. Coradi AG—Alfred J. Amsler & Co. STAND 111 
Seebacherstr. 53-55, Zürich, Switzerland Examination Hall 
Gordon Square 
Exhibit Third Floor 
Fully Electronic Co-ordinatograph for punch tape (shown), punch card, 
keyboard or flexowriter. Applications in industry for lofting of master 
templates and automatic machinery control; in aerial survey for graphic 
representations of calculations for earth moving and producing profiles; 
in civil engineering for highway cross-section and highway plan and profile, 
mapping and drafting of tape and card data; in electrical engineering for 
printed circuit construction and checking; in geology and geophysics for 
plotting seismic and gravity data; in geodetic and navigational calculations. 
Small Manual Co-ordinatograph of conventional type but with greatly 
improved design. 
New Cora-Senior and Cora-Junior Planimeters. Unique design with 
completely-enclosed dust-proof measuring head and fully-jewelled pivots. 
Integrators and Integraphs. 
LogEtronics—Europe STAND 112 
II, rue Tronchet, Paris, France Examination Hall 
Gordon Square 
Representative: EMI Electronics Third Floor 
Exhibit 
Contact Printer C-P 54. 
Roll Film Transport. 
Enlarger B-10. 
Reducer R-54. 
Activities and Products 
Electronics machines devoted to print and (or) enlarge films or reduce it 
to microfilms. 
LogEtronics Inc. STAND 113 
500 East Monroe Ave., Alexandria, Virginia, U.S.A. Examination Hall 
Gordon Square 
Representatives: O. F. Johnson Third Floor 
R. N. Johnson 
D. Curry, III 
D. R. Craig 
Exhibit 
The various logetronic systems for producing fully dodged aerial photo 
graphs automatically with electronically controlled printers and enlargers. 
Activities and Products 
LogEtronics Inc. manufactures a complete line of automatic, electronically 
controlled contact printers, high-speed continuous strip printers, and 
enlargers. 
Barr and Stroud Limited STAND 114 
Anniesland, Glasgow, W.3, Scotland Examination Hall 
Gordon Square 
Third Floor 
Exhibit 
The Barr & Stroud Power OperatedPhotonymograph Type K.C.4. Produces 
with great versatility, high-quality print for subsequent photographic 
reproduction—as in cartography, or for direct use. Facilities for tabula 
tion and justification are under development. 
The Barr & Stroud Dendrometer. Is a small specialised rangefinder 
incorporating an inclinometer. It is used to measure distance, height, and 
the widths of tree trunks—in estimating growth and timber yield. 
The Barr & Stroud Field Works Stereoscope Type Z.D. 16. Is intended 
for precise measurement, in the field, of topographical features in small 
areas of stereo-photographs up to 5 in. square with 60% overlap. 
Activities and Products 
The firm of Barr & Stroud Ltd. was rounded in 1888 for the manufacture 
of rangefinders and gunnery fire control instruments. Its activities now 
include the manufacture of a very wide range of mechanical, optical, and 
electronic equipment. 
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