Airship design mb-width 8417 sheep and lambs in the

sheep and lambs in the foreground

Macleay's collection

It is an allusion to the mayoral election of1771

' With right ascension and North polar distance

'The idle 'prentice turn'd away and sent to sea'

Airship design mb-width 8417 sheep and lambs in theEngineering design for a 'manageable air balloon' or dirigible, sent to the Royal Society with a covering letter from its inventor and supplementary descriptive information. The drawing contains four figures: a side elevation (figure 1); front and rear elevations (figures 2 3); and a transverse section through the balloon (figure 4). The airship has a twin bladed propeller sited at the front, driven by pulleys and ropes from an engine (unspecified