Sentence:  [T]he death of the said deceased Daniel Docherty, while in the defender's employment as an engineman, ... is alleged to have been owing to the engine house, which contained the engine of which the deceased had charge, being of a dangerous and improper construction, and the fly-wheel not having been <WSD>boxed</WSD> in or covered: ... 
Meaning of the word marked with <WSD> tags:  To furnish (for example, the axle of a wheel) with a box.