Greenough, Thomas (1710-1785), Boston; also made mathematical and surveying 

 instruments. 



Hagger, William G. (c.1744-1830?), Newport, R.I. 



Ham, James ffl. 1754-64), New York and Philadelphia; also made mathematical 

 instruments. 



Ham, James, Jr. (fl. 1780), Philadelphia; also made mathematical instruments. 



Hamlin, William (1772-1869), Providence, R.I.; also made mathematical instru- 

 ments. 



Jayne, John (late 18th century), Salem, Mass.; also made mathematical instru- 

 ments. 



King & Hagger (1759/60 to early 1760's), Newport, R.I.; also made mathematical 

 instruments. 



King, Benjamin (1707-1786), Newport, R.I.; also made mathematical instru- 

 ments. 



King, Benjamin (1740-1804), Salem, Mass. 



King, Daniel (1704-1790), Salem, Mass.; also made mathematical instruments. 



King, Samuel (fl. 1786), Newport, R.I.; also made mathematical instruments. 



Lamb, A., & Son (1780's), New York; also made mathematical instruments.- 



Lamb, Anthony (1703-1784), Virginia, Philadelphia, New York, and Hunter's 

 Key, N.Y.; also made mathematical and surveying instruments. 



Lamb, John (1735-1800), New York; also made surveying and mathematical 

 instruments. 



Newell, Andrew (1749-1798), Boston; also made mathematical instruments. 



Pease, Paul (fl. 1750), probably Rhode Island. 



Thaxter, Samuel (1769-1842), Boston; also made mathematical and surveying 

 instruments. 



Warren, Benjamin (fl. 1740-1790), Plymouth, Mass.; also made surveying instru- 

 ments. 



Williams, William (1737/38-1792), Boston; also made mathematical instruments. 



OPTICAL 



Benson, John (fl. 1793-1797). 



Clark, Robert (fl. 1785), Charleston, S.C.; also made nautical and surveying 



instruments. 

 Sommer, Widow Balthaser (fl. 1753), New York. 



Whitney, John (fl. 1801), Philadelphia; also made mathematical instruments. 

 Whitney, Thomas (fl. 1798-1821), Philadelphia; also made mathematical and 



surveying instruments. 



SURGICAL 



Bailey, John (fl. 1778), Fishkill, N.Y.; also made surveying instruments. 

 Fosbrook, W. (fl. 1786), New York; also made dental instruments. 

 Youle, James (1740-1786), New York. 

 Youle, John (fl. 1786), New York. 



169 



