Figure 17. — Brass surveying compass made by Stephen Greenleaf (fl. 1745) of 

 Boston. Photo courtesy New Hampshire Historical Society, Concord. 



Following Daniel's death, his business in instruments was 

 inherited by his son Benjamin King (1740-1804), of Salem. Ben- 

 jamin specialized in producing nautical instruments, and several 

 of his Davis quadrants have survived in public collections. When 

 he died on December 26, 1804, Reverend Bentley wrote that King 

 was". . . a Mathematical Instrument maker, in that branch which 

 immediately regarded practical navigation by quadrant and 

 compass. He supported a very good character through life & 

 was much esteemed." ^^ 



Another of the very early mathematical instrument makers in 

 Massachusetts was Stephen Greenleaf (see fig. 17), who kept a shop 

 on Queen Street opposite the prison in Boston where 



He makes and Mends all Sorts of Mathematical Instruments, as Theodo- 

 lites, Spirit Levels, Semicircles, Circumferences, and Protractors, Horizontal 



2» Ibid., vol. 3, p. 130. 



37 



