LOCOMOTIVE 
ENGINE 
45.5 
there is the leverage of the whole length of the axle to keep them upright, but when 
they are loose there is only the hold of the thickness of the nave. 
The construction of the wheels is shewn in figs. 32, 33,34, and 35, to a scale of an 
Fig. 32. 
Fig. 34 
inch and a half to a foot, or double the size of the engravings. Fig. 32 is a section 
through the centre of one of the small wheels, and fig. 33, is a cross section through 
Fig. 35. 
Fig. 33.