Title
Speaking Trumpet
Caption
Using a speaking trumpet to communicate on deck of a ship. Within limits, the larger the trumpet the further the voice will carry. From ''Natural Philosophy'' by A. Ganot, London, 1887
Date
1887
Credit line
Photo12/Ann Ronan Picture Library
Reference
ARP18A08_489
License type
Rights managed
Available size
60,0Mb (3,8Mb) / 18,4in x 12,7in / 5517 x 3801 (300dpi)