INDEX TO ADVERTISEMENTS 
Page 
B. K.S. Air Survey Ltd 144 
Cleeve Road, Leatherhead, Surrey, England 
Bausch & Lomb Incorporated 145 
Bausch St., Rochester 2, N.Y., USA 
Canadian Applied Research Limited 146 
750 Lawrence Avenue West, Toronto 19, Ontario, Canada 
C. F. Casella & Co Ltd 147 
Regent House, Britannia Walk, London N 1, England 
D. E.P. Limited 148 
Frith Park, Walton-on-the-Hill, Tadworth, Surrey, England 
Fairey Air Surveys Ltd 149 
24 Bruton Street, London W 1, England 
Finnmap Engineering Co 150 
Kiviaidankatu 9, Helsinki, Finland 
Gevaert Photo-Producten N. V 151 
Mortsel (Antwerpen), Belgium 
Ilford Limited 152 
Ilford, Essex, England 
Klimsch & Co 148 
Frankfurt (Main), Schmittstrasse 12, German Federal Republic 
Kodak Ltd 153 
Kingsway, London WC 2, England 
Officine Galileo S.p.A. 154 
Via Carlo Bini 44, Firenze, Italy 
Rank Cintel Limited 155 
Worsley Bridge Road, Lower Sydenham, London SE 26, England 
Société d’Optique et de Mécanique de Haute Précision (SOM) . . . . 156 
125 Boulevard Davout, Paris 20e, France 
Svenska AB Gasaccumulator (AGA) 157 
Stockholm-Lidingö, Sweden 
Wild Heerbrugg AG 158, 159 
Heerbrugg, Switzerland 
Williamson Manufacturing Co Ltd 161 
Hawthorn Road, Willesden Green, London NW 10, England 
Zeiss-Aerotopograph GMBH 162, 163 
München 27, Ismaninger Strasse 57, German Federal Republic 
VEB Carl Zeiss Jena 160 
Jena, German Democratic Republic