Sentence:  But a Dictionary of this sort, containing, as it were, a Natural History, requires too many <WSD>Hands</WSD>, as well as too much Time, Cost, Pains and Sagacity, ever to be hoped for; and till that be done, we must content ourselves with such Definitions of the Names of Substances, as explain the Sense Men use them in. 
Meaning of the word marked with <WSD> tags:  An agent; a servant, or manual laborer, especially in compounds; a workman, trained or competent for special service or duty; a performer more or less skillful.