Photograph Album of Elliott Dreyer and Related Instruments Volume 3, 1920s

Volume 3 (of 8, the others are 13020, 13021, 13023 to 13027). 45 numbered leaves/photos, continuing from and similar to preceding volume (13021), all naval fire control and related, including slide rule for rate of change of bearing, 'Modified Dumaresq Instrument Mark VIII for Torpedo', 'Col. Hill's A.A. Sight', 'Attack Teacher Trolley', 'Special Indicating & Recording Wind Direction Receiver made for Air Board'; most photographs captioned in manuscript. No dates, list in pocket at back.

Part of a series of 8 albums of photographs of naval fire control and related instruments in research and development stages, 1923-29, together with some photographs of experimental models, prototypes, and laboratory arrangements, and general views of the research laboratories and factory workshops [at Century Works, Lewisham].