Sentence:  Supposing a frame, or set of moulds, as represented at B, to have wicks carried through each mould, or regularly <WSD>cottoned</WSD>, and each wick to be held accurately in the centre of the mould by means of the series of nippers shown at fig. 8, the moulds are first taken to the position shown at B 1, figs. 2,  3, and 4, where they are supported in a perpendicular position on the small straight edges or railway d, d, as seen at fig. 3. 
Meaning of the word marked with <WSD> tags:  To supply with a cotton wick.