Instruments

8vo [25 x 16 cm]; xvi, 178 pp, 81 illustrations from photos and drawings including charts, index. original cloth, gilt spine title lettering, previous owner's name on endpaper, else fine and clean in good dj (chipped at edges, price clipped). A picture of this book is available upon request by email. A very detailed work with all the details needed to make accurate aerial photographs, with formulas, charts, equipment and detailed examples. The author had served in the last war with the Canadian Military Survey and developed his methods after the war where speed and accuracy were both essential. There are excellent photos in the book of the equipment used, and details on stereoscopy and photogrammetry.