1851 Great Exhibition: Official Catalogue: Class VIII.: Joseph Augustus Clarke
135. CLARKE, JOSEPH AUG., 7 Hamilton Sq., Birkenhead - Designer.
Model of a steam vessel to a scale of half an inch to the foot; intended to represent a steam vessel of improved construction, and to show how increase of speed may be obtained by using wheels with moveable floats, instead of wheels with fixed floats: wheels with moveable floats are attached to the model.