| This Electric Engine does not appear in the 1842, 1848
or 1851 editions of Daniel Davis's Manual of Magnetism. However,
it is clearly a piece of Davis apparatus, with its typical turnings, base
shape and connection screws.
It most closely resembles the upright axial engine in the 1851 edition of the Manual, although it has one pair of solenoids instead of two.
The portion of the horizontal axle against which the vertical make-and-break contact strip on the left-hand side once rode has been broken off.
This unusual piece is in the collection of apparatus at Transylvania University in Lexington, Kentucky.