Mr Martyn's Design

print, etching and aquatint printed in sepia, Mr Martyn's design for an aerostatic globe 1783, with descriptive key in English and French, published by Thomas Martyn, King Street Covent Garden London 2 October 1784. Scale 6ft : 1in. Image 33.5x27cm. Earliest English design for navigable balloon,using erroneous combination of sails oar and rudder